\input texinfo @c -*-texinfo-*- @c %**start of header @setfilename ../info/tramp @settitle TRAMP User Manual @setchapternewpage odd @c %**end of header @c This is *so* much nicer :) @footnotestyle end @c In the Tramp CVS, the version number is auto-frobbed from @c configure.ac, so you should edit that file and run @c "autoconf && ./configure" to change the version number. @c Additionally, flags are set with respect to the Emacs flavor; and @c depending whether Tramp is packaged into (X)Emacs, or standalone. @include trampver.texi @c Macros for formatting a filename. @c trampfn is for a full filename, trampfnmhp means method, host, localname @c were given, and so on. @macro trampfn(method, user, host, localname) @value{prefix}@value{method}@value{user}@@@value{host}@value{postfix}@value{localname} @end macro @copying Copyright @copyright{} 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. @quotation Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with the Front-Cover texts being ``A GNU Manual'', and with the Back-Cover Texts as in (a) below. A copy of the license is included in the section entitled ``GNU Free Documentation License'' in the Emacs manual. (a) The FSF's Back-Cover Text is: ``You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development.'' This document is part of a collection distributed under the GNU Free Documentation License. If you want to distribute this document separately from the collection, you can do so by adding a copy of the license to the document, as described in section 6 of the license. @end quotation @end copying @c Entries for @command{install-info} to use @dircategory @value{emacsname} @direntry * TRAMP: (tramp). Transparent Remote Access, Multiple Protocol @value{emacsname} remote file access via rsh and rcp. @end direntry @tex @titlepage @title @value{tramp} version @value{trampver} User Manual @author by Daniel Pittman @author based on documentation by Kai Gro@ss{}johann @page @insertcopying @end titlepage @page @end tex @ifnottex @node Top, Overview, (dir), (dir) @top @value{tramp} version @value{trampver} User Manual This file documents @value{tramp} version @value{trampver}, a remote file editing package for @value{emacsname}. @value{tramp} stands for `Transparent Remote (file) Access, Multiple Protocol'. This package provides remote file editing, similar to @value{ftppackagename}. The difference is that @value{ftppackagename} uses FTP to transfer files between the local and the remote host, whereas @value{tramp} uses a combination of @command{rsh} and @command{rcp} or other work-alike programs, such as @command{ssh}/@command{scp}. You can find the latest version of this document on the web at @uref{http://www.gnu.org/software/tramp/}. @c Pointer to the other Emacs flavor is necessary only in case of @c standalone installation. @ifset installchapter The manual has been generated for @value{emacsname}. @ifinfo If you want to read the info pages for @value{emacsothername}, you should read in @ref{Installation} how to create them. @end ifinfo @ifhtml If you're using the other Emacs flavor, you should read the @uref{@value{emacsotherfilename}, @value{emacsothername}} pages. @end ifhtml @end ifset @ifhtml @ifset jamanual This manual is also available as a @uref{@value{japanesemanual}, Japanese translation}. @end ifset The latest release of @value{tramp} is available for @uref{http://ftp.gnu.org/gnu/tramp/, download}, or you may see @ref{Obtaining Tramp} for more details, including the CVS server details. @value{tramp} also has a @uref{http://savannah.gnu.org/projects/tramp/, Savannah Project Page}. @end ifhtml There is a mailing list for @value{tramp}, available at @email{tramp-devel@@gnu.org}, and archived at @uref{http://lists.gnu.org/archive/html/tramp-devel/, the @value{tramp} Mail Archive}. @ifhtml Older archives are located at @uref{http://sourceforge.net/mailarchive/forum.php?forum=tramp-devel, SourceForge Mail Archive} and @uref{http://www.mail-archive.com/emacs-rcp@@ls6.cs.uni-dortmund.de/, The Mail Archive}. @c in HTML output, there's no new paragraph. @*@* @end ifhtml @insertcopying @end ifnottex @menu * Overview:: What @value{tramp} can and cannot do. For the end user: * Obtaining Tramp:: How to obtain @value{tramp}. * History:: History of @value{tramp}. @ifset installchapter * Installation:: Installing @value{tramp} with your @value{emacsname}. @end ifset * Configuration:: Configuring @value{tramp} for use. * Usage:: An overview of the operation of @value{tramp}. * Bug Reports:: Reporting Bugs and Problems. * Frequently Asked Questions:: Questions and answers from the mailing list. * Concept Index:: An item for each concept. For the developer: * Version Control:: The inner workings of remote version control. * Files directories and localnames:: How file names, directories and localnames are mangled and managed. * Issues:: Debatable Issues and What Was Decided. @detailmenu --- The Detailed Node Listing --- @c @ifset installchapter Installing @value{tramp} with your @value{emacsname} * Installation parameters:: Parameters in order to control installation. * Load paths:: How to plug-in @value{tramp} into your environment. * Japanese manual:: Japanese manual. @end ifset Configuring @value{tramp} for use * Connection types:: Types of connections made to remote machines. * Inline methods:: Inline methods. * External transfer methods:: External transfer methods. * Multi-hop Methods:: Connecting to a remote host using multiple hops. * Default Method:: Selecting a default method. * Customizing Methods:: Using Non-Standard Methods. * Customizing Completion:: Selecting config files for user/host name completion. * Password caching:: Reusing passwords for several connections. * Remote Programs:: How @value{tramp} finds and uses programs on the remote machine. * Remote shell setup:: Remote shell setup hints. * Windows setup hints:: Issues with Cygwin ssh. * Auto-save and Backup:: Auto-save and Backup. Using @value{tramp} * Filename Syntax:: @value{tramp} filename conventions. * Multi-hop filename syntax:: Multi-hop filename conventions. * Filename completion:: Filename completion. * Dired:: Dired. * Compilation:: Compile remote files. The inner workings of remote version control * Version Controlled Files:: Determining if a file is under version control. * Remote Commands:: Executing the version control commands on the remote machine. * Changed workfiles:: Detecting if the working file has changed. * Checking out files:: Bringing the workfile out of the repository. * Miscellaneous Version Control:: Things related to Version Control that don't fit elsewhere. Things related to Version Control that don't fit elsewhere * Remote File Ownership:: How VC determines who owns a workfile. * Back-end Versions:: How VC determines what release your RCS is. How file names, directories and localnames are mangled and managed * Localname deconstruction:: Breaking a localname into its components. @end detailmenu @end menu @node Overview @chapter An overview of @value{tramp} @cindex overview After the installation of @value{tramp} into your @value{emacsname}, you will be able to access files on remote machines as though they were local. Access to the remote file system for editing files, version control, and @code{dired} are transparently enabled. Your access to the remote machine can be with the @command{rsh}, @command{rlogin}, @command{telnet} programs or with any similar connection method. This connection must pass @acronym{ASCII} successfully to be usable but need not be 8-bit clean. The package provides support for @command{ssh} connections out of the box, one of the more common uses of the package. This allows relatively secure access to machines, especially if @command{ftp} access is disabled. The majority of activity carried out by @value{tramp} requires only that the remote login is possible and is carried out at the terminal. In order to access remote files @value{tramp} needs to transfer their content to the local machine temporarily. @value{tramp} can transfer files between the machines in a variety of ways. The details are easy to select, depending on your needs and the machines in question. The fastest transfer methods (for large files) rely on a remote file transfer package such as @command{rcp}, @command{scp} or @command{rsync}. If the remote copy methods are not suitable for you, @value{tramp} also supports the use of encoded transfers directly through the shell. This requires that the @command{mimencode} or @command{uuencode} tools are available on the remote machine. These methods are generally faster for small files. Within these limitations, @value{tramp} is quite powerful. It is worth noting that, as of the time of writing, it is far from a polished end-user product. For a while yet you should expect to run into rough edges and problems with the code now and then. It is finished enough that the developers use it for day to day work but the installation and setup can be a little difficult to master, as can the terminology. @value{tramp} is still under active development and any problems you encounter, trivial or major, should be reported to the @value{tramp} developers. @xref{Bug Reports}. @subsubheading Behind the scenes @cindex behind the scenes @cindex details of operation @cindex how it works This section tries to explain what goes on behind the scenes when you access a remote file through @value{tramp}. Suppose you type @kbd{C-x C-f} and enter part of an @value{tramp} file name, then hit @kbd{@key{TAB}} for completion. Suppose further that this is the first time that @value{tramp} is invoked for the host in question. Here's what happens: @itemize @item @value{tramp} discovers that it needs a connection to the host. So it invokes @samp{telnet @var{host}} or @samp{rsh @var{host} -l @var{user}} or a similar tool to connect to the remote host. Communication with this process happens through an @value{emacsname} buffer, that is, the output from the remote end goes into a buffer. @item The remote host may prompt for a login name (for @command{telnet}). The login name is given in the file name, so @value{tramp} sends the login name and a newline. @item The remote host may prompt for a password or pass phrase (for @command{rsh} or for @command{telnet} after sending the login name). @value{tramp} displays the prompt in the minibuffer, asking you for the password or pass phrase. You enter the password or pass phrase. @value{tramp} sends it to the remote host, followed by a newline. @item @value{tramp} now waits for the shell prompt or for a message that the login failed. If @value{tramp} sees neither of them after a certain period of time (a minute, say), then it issues an error message saying that it couldn't find the remote shell prompt and shows you what the remote host has sent. If @value{tramp} sees a @samp{login failed} message, it tells you so, aborts the login attempt and allows you to try again. @item Suppose that the login was successful and @value{tramp} sees the shell prompt from the remote host. Now @value{tramp} invokes @command{/bin/sh} because Bourne shells and C shells have different command syntaxes.@footnote{Invoking @command{/bin/sh} will fail if your login shell doesn't recognize @samp{exec /bin/sh} as a valid command. Maybe you use the Scheme shell @command{scsh}@dots{}} After the Bourne shell has come up, @value{tramp} sends a few commands to ensure a good working environment. It turns off echoing, it sets the shell prompt, and a few other things. @item Now the remote shell is up and it good working order. Remember, what was supposed to happen is that @value{tramp} tries to find out what files exist on the remote host so that it can do filename completion. So, @value{tramp} basically issues @command{cd} and @command{ls} commands and also sometimes @command{echo} with globbing. Another command that is often used is @command{test} to find out whether a file is writable or a directory or the like. The output of each command is parsed for the necessary operation. @item Suppose you are finished with filename completion, have entered @kbd{C-x C-f}, a full file name and hit @kbd{@key{RET}}. Now comes the time to transfer the file contents from the remote host to the local host so that you can edit them. See above for an explanation of how @value{tramp} transfers the file contents. For inline transfers, @value{tramp} issues a command like @samp{mimencode -b /path/to/remote/file}, waits until the output has accumulated in the buffer that's used for communication, then decodes that output to produce the file contents. For out-of-band transfers, @value{tramp} issues a command like the following: @example rcp user@@host:/path/to/remote/file /tmp/tramp.4711 @end example It then reads the local temporary file @file{/tmp/tramp.4711} into a buffer and deletes the temporary file. @item You now edit the buffer contents, blithely unaware of what has happened behind the scenes. (Unless you have read this section, that is.) When you are finished, you type @kbd{C-x C-s} to save the buffer. @item Again, @value{tramp} transfers the file contents to the remote host either inline or out-of-band. This is the reverse of what happens when reading the file. @end itemize I hope this has provided you with a basic overview of what happens behind the scenes when you open a file with @value{tramp}. @c For the end user @node Obtaining Tramp @chapter Obtaining Tramp. @cindex obtaining Tramp @value{tramp} is freely available on the Internet and the latest release may be downloaded from @uref{http://ftp.gnu.org/gnu/tramp/}. This release includes the full documentation and code for @value{tramp}, suitable for installation. But GNU Emacs (22 or later) includes @value{tramp} already, and there is a @value{tramp} package for XEmacs, as well. So maybe it is easier to just use those. But if you want the bleeding edge, read on@dots{...} For the especially brave, @value{tramp} is available from CVS. The CVS version is the latest version of the code and may contain incomplete features or new issues. Use these versions at your own risk. Instructions for obtaining the latest development version of @value{tramp} from CVS can be found by going to the Savannah project page at the following URL and then clicking on the CVS link in the navigation bar at the top. @noindent @uref{http://savannah.gnu.org/projects/tramp/} @noindent Or follow the example session below: @example ] @strong{cd ~/@value{emacsdir}} ] @strong{export CVS_RSH="ssh"} ] @strong{cvs -z3 -d:ext:anoncvs@@savannah.gnu.org:/cvsroot/tramp co tramp} @end example @noindent You should now have a directory @file{~/@value{emacsdir}/tramp} containing the latest version of @value{tramp}. You can fetch the latest updates from the repository by issuing the command: @example ] @strong{cd ~/@value{emacsdir}/tramp} ] @strong{export CVS_RSH="ssh"} ] @strong{cvs update -d} @end example @noindent Once you've got updated files from the CVS repository, you need to run @command{autoconf} in order to get an up-to-date @file{configure} script: @example ] @strong{cd ~/@value{emacsdir}/tramp} ] @strong{autoconf} @end example @node History @chapter History of @value{tramp} @cindex history @cindex development history Development was started end of November 1998. The package was called @file{rssh.el}, back then. It only provided one method to access a file, using @command{ssh} to log in to a remote host and using @command{scp} to transfer the file contents. After a while, the name was changed to @file{rcp.el}, and now it's @value{tramp}. Along the way, many more methods for getting a remote shell and for transferring the file contents were added. Support for VC was added. The most recent addition of major features were the multi-hop methods added in April 2000 and the unification of @value{tramp} and Ange-FTP filenames in July 2002. @c Installation chapter is necessary only in case of standalone @c installation. Text taken from trampinst.texi. @ifset installchapter @include trampinst.texi @end ifset @node Configuration @chapter Configuring @value{tramp} for use @cindex configuration @cindex default configuration @value{tramp} is (normally) fully functional when it is initially installed. It is initially configured to use the @command{ssh} program to connect to the remote host and to use base64 or uu encoding to transfer the files through that shell connection. So in the easiest case, you just type @kbd{C-x C-f} and then enter the filename @file{@value{prefix}@var{user}@@@var{machine}@value{postfix}@var{/path/to.file}}. On some hosts, there are problems with opening a connection. These are related to the behavior of the remote shell. See @xref{Remote shell setup}, for details on this. If you do not wish to use these commands to connect to the remote host, you should change the default connection and transfer method that @value{tramp} uses. There are several different methods that @value{tramp} can use to connect to remote machines and transfer files (@pxref{Connection types}). If you don't know which method is right for you, see @xref{Default Method}. @menu * Connection types:: Types of connections made to remote machines. * Inline methods:: Inline methods. * External transfer methods:: External transfer methods. * Multi-hop Methods:: Connecting to a remote host using multiple hops. * Default Method:: Selecting a default method. Here we also try to help those who don't have the foggiest which method is right for them. * Customizing Methods:: Using Non-Standard Methods. * Customizing Completion:: Selecting config files for user/host name completion. * Password caching:: Reusing passwords for several connections. * Remote Programs:: How @value{tramp} finds and uses programs on the remote machine. * Remote shell setup:: Remote shell setup hints. * Windows setup hints:: Issues with Cygwin ssh. * Auto-save and Backup:: Auto-save and Backup. @end menu @node Connection types @section Types of connections made to remote machines. @cindex connection types, overview There are two basic types of transfer methods, each with its own advantages and limitations. Both types of connection make use of a remote shell access program such as @command{rsh}, @command{ssh} or @command{telnet} to connect to the remote machine. This connection is used to perform many of the operations that @value{tramp} requires to make the remote file system transparently accessible from the local machine. It is only when visiting files that the methods differ. @cindex inline methods @cindex external transfer methods @cindex external methods @cindex out-of-band methods @cindex methods, inline @cindex methods, external transfer @cindex methods, out-of-band Loading or saving a remote file requires that the content of the file be transfered between the two machines. The content of the file can be transfered over the same connection used to log in to the remote machine or the file can be transfered through another connection using a remote copy program such as @command{rcp}, @command{scp} or @command{rsync}. The former are called @dfn{inline methods}, the latter are called @dfn{out-of-band methods} or @dfn{external transfer methods} (@dfn{external methods} for short). The performance of the external transfer methods is generally better than that of the inline methods, at least for large files. This is caused by the need to encode and decode the data when transferring inline. The one exception to this rule are the @command{scp} based transfer methods. While these methods do see better performance when actually transferring files, the overhead of the cryptographic negotiation at startup may drown out the improvement in file transfer times. External transfer methods should be configured such a way that they don't require a password (with @command{ssh-agent}, or such alike). If it isn't possible, you should consider @ref{Password caching}, otherwise you will be prompted for a password every copy action. @cindex multi-hop methods @cindex methods, multi-hop A variant of the inline methods are the @dfn{multi-hop methods}. These methods allow you to connect a remote host using a number `hops', each of which connects to a different host. This is useful if you are in a secured network where you need to go through a bastion host to connect to the outside world. @node Inline methods @section Inline methods @cindex inline methods @cindex methods, inline The inline methods in @value{tramp} are quite powerful and can work in situations where you cannot use an external transfer program to connect. Inline methods are the only methods that work when connecting to the remote machine via telnet. (There are also strange inline methods which allow you to transfer files between @emph{user identities} rather than hosts, see below.) These methods depend on the existence of a suitable encoding and decoding command on remote machine. Locally, @value{tramp} may be able to use features of @value{emacsname} to decode and encode the files or it may require access to external commands to perform that task. @cindex uuencode @cindex mimencode @cindex base-64 encoding @value{tramp} checks the availability and usability of commands like @command{mimencode} (part of the @command{metamail} package) or @command{uuencode} on the remote host. The first reliable command will be used. The search path can be customized, see @ref{Remote Programs}. If both commands aren't available on the remote host, @value{tramp} transfers a small piece of Perl code to the remote host, and tries to apply it for encoding and decoding. @table @asis @item @option{rsh} @cindex method rsh @cindex rsh method Connect to the remote host with @command{rsh}. Due to the unsecure connection it is recommended for very local host topology only. On operating systems which provide the command @command{remsh} instead of @command{rsh}, you can use the method @option{remsh}. This is true for HP-UX or Cray UNICOS, for example. @item @option{ssh} @cindex method ssh @cindex ssh method Connect to the remote host with @command{ssh}. This is identical to the previous option except that the @command{ssh} package is used, making the connection more secure. There are also two variants, @option{ssh1} and @option{ssh2}, that call @samp{ssh -1} and @samp{ssh -2}, respectively. This way, you can explicitly select whether you want to use the SSH protocol version 1 or 2 to connect to the remote host. (You can also specify in @file{~/.ssh/config}, the SSH configuration file, which protocol should be used, and use the regular @option{ssh} method.) Two other variants, @option{ssh1_old} and @option{ssh2_old}, use the @command{ssh1} and @command{ssh2} commands explicitly. If you don't know what these are, you do not need these options. All the methods based on @command{ssh} have an additional kludgy feature: you can specify a host name which looks like @file{host#42} (the real host name, then a hash sign, then a port number). This means to connect to the given host but to also pass @code{-p 42} as arguments to the @command{ssh} command. @item @option{telnet} @cindex method telnet @cindex telnet method Connect to the remote host with @command{telnet}. This is as unsecure as the @option{rsh} method. @item @option{su} @cindex method su @cindex su method This method does not connect to a remote host at all, rather it uses the @command{su} program to allow you to edit files as another user. @item @option{sudo} @cindex method sudo @cindex sudo method This is similar to the @option{su} method, but it uses @command{sudo} rather than @command{su} to become a different user. Note that @command{sudo} must be configured to allow you to start a shell as the user. It would be nice if it was sufficient if @command{ls} and @command{mimencode} were allowed, but that is not easy to implement, so I haven't got around to it, yet. @item @option{sshx} @cindex method sshx @cindex sshx method As you would expect, this is similar to @option{ssh}, only a little different. Whereas @option{ssh} opens a normal interactive shell on the remote host, this option uses @samp{ssh -t -t @var{host} -l @var{user} /bin/sh} to open a connection. This is useful for users where the normal login shell is set up to ask them a number of questions when logging in. This procedure avoids these questions, and just gives @value{tramp} a more-or-less `standard' login shell to work with. Note that this procedure does not eliminate questions asked by @command{ssh} itself. For example, @command{ssh} might ask ``Are you sure you want to continue connecting?'' if the host key of the remote host is not known. @value{tramp} does not know how to deal with such a question (yet), therefore you will need to make sure that you can log in without such questions. This is also useful for Windows users where @command{ssh}, when invoked from an @value{emacsname} buffer, tells them that it is not allocating a pseudo tty. When this happens, the login shell is wont to not print any shell prompt, which confuses @value{tramp} mightily. For reasons unknown, some Windows ports for @command{ssh} require the doubled @samp{-t} option. This supports the @samp{-p} kludge. @item @option{krlogin} @cindex method krlogin @cindex km krlogin @cindex Kerberos (with krlogin method) This method is also similar to @option{ssh}. It only uses the @command{krlogin -x} command to log in to the remote host. @item @option{plink} @cindex method plink @cindex plink method This method is mostly interesting for Windows users using the PuTTY implementation of SSH. It uses @samp{plink -ssh} to log in to the remote host. Additionally, the method @option{plink1} is provided, which calls @samp{plink -1 -ssh} in order to use SSH protocol version 1 explicitely. CCC: Do we have to connect to the remote host once from the command line to accept the SSH key? Maybe this can be made automatic? CCC: Does @command{plink} support the @samp{-p} option? @value{tramp} will support that, anyway. @end table @node External transfer methods @section External transfer methods @cindex methods, external transfer @cindex methods, out-of-band @cindex external transfer methods @cindex out-of-band methods The external transfer methods operate through multiple channels, using the remote shell connection for many actions while delegating file transfers to an external transfer utility. This saves the overhead of encoding and decoding that multiplexing the transfer through the one connection has with the inline methods. If you want to use an external transfer method you should be able to execute the transfer utility to copy files to and from the remote machine without any interaction. @cindex ssh-agent This means that you will need to use @command{ssh-agent} if you use the @command{scp} program for transfers, or maybe your version of @command{scp} accepts a password on the command line.@footnote{PuTTY's @command{pscp} allows you to specify the password on the command line.} If you use @command{rsync} via @command{ssh} then the same rule must apply to that connection. If you cannot get an external method to run without asking for a password you should consider @ref{Password caching}. @table @asis @item @option{rcp} --- @command{rsh} and @command{rcp} @cindex method rcp @cindex rcp method @cindex rcp (with rcp method) @cindex rsh (with rcp method) This method uses the @command{rsh} and @command{rcp} commands to connect to the remote machine and transfer files. This is probably the fastest connection method available. The alternative method @option{remcp} uses the @command{remsh} and @command{rcp} commands. It should be applied on machines where @command{remsh} is used instead of @command{rsh}. @item @option{scp} --- @command{ssh} and @command{scp} @cindex method scp @cindex scp method @cindex scp (with scp method) @cindex ssh (with scp method) Using @command{ssh} to connect to the remote host and @command{scp} to transfer files between the machines is the best method for securely connecting to a remote machine and accessing files. The performance of this option is also quite good. It may be slower than the inline methods when you often open and close small files however. The cost of the cryptographic handshake at the start of an @command{scp} session can begin to absorb the advantage that the lack of encoding and decoding presents. There are also two variants, @option{scp1} and @option{scp2}, that call @samp{ssh -1} and @samp{ssh -2}, respectively. This way, you can explicitly select whether you want to use the SSH protocol version 1 or 2 to connect to the remote host. (You can also specify in @file{~/.ssh/config}, the SSH configuration file, which protocol should be used, and use the regular @option{scp} method.) Two other variants, @option{scp1_old} and @option{scp2_old}, use the @command{ssh1} and @command{ssh2} commands explicitly. If you don't know what these are, you do not need these options. All the @command{ssh} based methods support the kludgy @samp{-p} feature where you can specify a port number to connect to in the host name. For example, the host name @file{host#42} tells @value{tramp} to specify @samp{-p 42} in the argument list for @command{ssh}. @item @option{rsync} --- @command{ssh} and @command{rsync} @cindex method rsync @cindex rsync method @cindex rsync (with rsync method) @cindex ssh (with rsync method) Using the @command{ssh} command to connect securely to the remote machine and the @command{rsync} command to transfer files is almost identical to the @option{scp} method. While @command{rsync} performs much better than @command{scp} when transferring files that exist on both hosts, this advantage is lost if the file exists only on one side of the connection. The @command{rsync} based method may be considerably faster than the @command{rcp} based methods when writing to the remote system. Reading files to the local machine is no faster than with a direct copy. This method supports the @samp{-p} hack. @item @option{scpx} --- @command{ssh} and @command{scp} @cindex method scpx @cindex scpx method @cindex scp (with scpx method) @cindex ssh (with scpx method) As you would expect, this is similar to @option{scp}, only a little different. Whereas @option{scp} opens a normal interactive shell on the remote host, this option uses @samp{ssh -t -t @var{host} -l @var{user} /bin/sh} to open a connection. This is useful for users where the normal login shell is set up to ask them a number of questions when logging in. This procedure avoids these questions, and just gives @value{tramp} a more-or-less `standard' login shell to work with. This is also useful for Windows users where @command{ssh}, when invoked from an @value{emacsname} buffer, tells them that it is not allocating a pseudo tty. When this happens, the login shell is wont to not print any shell prompt, which confuses @value{tramp} mightily. This method supports the @samp{-p} hack. @item @option{pscp} --- @command{plink} and @command{pscp} @cindex method pscp @cindex pscp method @cindex pscp (with pscp method) @cindex plink (with pscp method) @cindex PuTTY (with pscp method) This method is similar to @option{scp}, but it uses the @command{plink} command to connect to the remote host, and it uses @command{pscp} for transferring the files. These programs are part of PuTTY, an SSH implementation for Windows. CCC: Does @command{plink} support the @samp{-p} hack? @item @option{fcp} --- @command{fsh} and @command{fcp} @cindex method fcp @cindex fcp method @cindex fsh (with fcp method) @cindex fcp (with fcp method) This method is similar to @option{scp}, but it uses the @command{fsh} command to connect to the remote host, and it uses @command{fcp} for transferring the files. @command{fsh/fcp} are a front-end for @command{ssh} which allow for reusing the same @command{ssh} session for submitting several commands. This avoids the startup overhead of @command{scp} (which has to establish a secure connection whenever it is called). Note, however, that you can also use one of the inline methods to achieve a similar effect. This method uses the command @samp{fsh @var{host} -l @var{user} /bin/sh -i} to establish the connection, it does not work to just say @command{fsh @var{host} -l @var{user}}. @cindex method fsh @cindex fsh method There is no inline method using @command{fsh} as the multiplexing provided by the program is not very useful in our context. @value{tramp} opens just one connection to the remote host and then keeps it open, anyway. @item @option{ftp} @cindex method ftp @cindex ftp method This is not a native @value{tramp} method. Instead of, it forwards all requests to @value{ftppackagename}. @ifset xemacs This works only for unified filenames, see @ref{Issues}. @end ifset @item @option{smb} --- @command{smbclient} @cindex method smb @cindex smb method This is another not natural @value{tramp} method. It uses the @command{smbclient} command on different Unices in order to connect to an SMB server. An SMB server might be a Samba (or CIFS) server on another UNIX host or, more interesting, a host running MS Windows. So far, it is tested towards MS Windows NT, MS Windows 2000, and MS Windows XP. The first directory in the localname must be a share name on the remote host. Remember, that the @code{$} character in which default shares usually end, must be written @code{$$} due to environment variable substitution in file names. If no share name is given (i.e. remote directory @code{/}), all available shares are listed. Since authorization is done on share level, you will be prompted always for a password if you access another share on the same host. This can be suppressed by @ref{Password caching}. MS Windows uses for authorization both a user name and a domain name. Because of this, the @value{tramp} syntax has been extended: you can specify a user name which looks like @code{user%domain} (the real user name, then a percent sign, then the domain name). So, to connect to the machine @code{melancholia} as user @code{daniel} of the domain @code{BIZARRE}, and edit @file{.emacs} in the home directory (share @code{daniel$}) I would specify the filename @file{@value{prefix}smb@value{postfixsinglehop}daniel%BIZARRE@@melancholia@value{postfix}/daniel$$/.emacs}. The domain name as well as the user name are optional. If no user name is specified at all, the anonymous user (without password prompting) is assumed. This is different from all other @value{tramp} methods, where in such a case the local user name is taken. The @option{smb} method supports the @samp{-p} hack. @strong{Please note:} If @value{emacsname} runs locally under MS Windows, this method isn't available. Instead of, you can use UNC file names like @file{//melancholia/daniel$$/.emacs}. The only disadvantage is that there's no possibility to specify another user name. @end table @node Multi-hop Methods @section Connecting to a remote host using multiple hops @cindex multi-hop methods @cindex methods, multi-hop Sometimes, the methods described before are not sufficient. Sometimes, it is not possible to connect to a remote host using a simple command. For example, if you are in a secured network, you might have to log in to a `bastion host' first before you can connect to the outside world. Of course, the target host may also require a bastion host. The format of multi-hop filenames is slightly different than the format of normal @value{tramp} methods. @cindex method multi @cindex multi method A multi-hop file name specifies a method, a number of hops, and a localname (path name on the remote system). The method name is always @option{multi}. Each hop consists of a @dfn{hop method} specification, a user name and a host name. The hop method can be an inline method only. The following hop methods are (currently) available: @table @option @item telnet @cindex hop method telnet @cindex telnet hop method Uses the well-known @command{telnet} program to connect to the host. Whereas user name and host name are supplied in the file name, the user is queried for the password. @item rsh @cindex hop method rsh @cindex rsh hop method This uses @command{rsh} to connect to the host. You do not need to enter a password unless @command{rsh} explicitly asks for it. The variant @option{remsh} uses the @command{remsh} command. It should be applied on machines where @command{remsh} is used instead of @command{rsh}. @item ssh @cindex hop method ssh @cindex ssh hop method This uses @command{ssh} to connect to the host. You might have to enter a password or a pass phrase. @item su @cindex hop method su @cindex su hop method This method does not actually contact a different host, but it allows you to become a different user on the host you're currently on. This might be useful if you want to edit files as root, but the remote host does not allow remote root logins. In this case you can use @option{telnet}, @option{rsh} or @option{ssh} to connect to the remote host as a non-root user, then use an @option{su} hop to become root. But @option{su} need not be the last hop in a sequence, you could also use it somewhere in the middle, if the need arises. Even though you @emph{must} specify both user and host with an @option{su} hop, the host name is ignored and only the user name is used. @item sudo @cindex hop method sudo @cindex sudo hop method This is similar to the @option{su} hop, except that it uses @command{sudo} rather than @command{su} to become a different user. @end table Some people might wish to use port forwarding with @command{ssh} or maybe they have to use a nonstandard port. This can be accomplished by putting a stanza in @file{~/.ssh/config} for the account which specifies a different port number for a certain host name. But it can also be accomplished within @value{tramp}, by adding a multi-hop method. For example: @lisp (add-to-list 'tramp-multi-connection-function-alist '("sshf" tramp-multi-connect-rlogin "ssh %h -l %u -p 4400%n")) @end lisp Now you can use an @option{sshf} hop which connects to port 4400 instead of the standard port. @node Default Method @section Selecting a default method @cindex default method @vindex tramp-default-method When you select an appropriate transfer method for your typical usage you should set the variable @code{tramp-default-method} to reflect that choice. This variable controls which method will be used when a method is not specified in the @value{tramp} file name. For example: @lisp (setq tramp-default-method "scp") @end lisp @vindex tramp-default-method-alist You can also specify different methods for certain user/host combinations, via the variable @code{tramp-default-method-alist}. For example, the following two lines specify to use the @option{ssh} method for all user names matching @samp{john} and the @option{rsync} method for all host names matching @samp{lily}. The third line specifies to use the @option{su} method for the user @samp{root} on the machine @samp{localhost}. @lisp (add-to-list 'tramp-default-method-alist '("" "john" "ssh")) (add-to-list 'tramp-default-method-alist '("lily" "" "rsync")) (add-to-list 'tramp-default-method-alist '("\\`localhost\\'" "\\`root\\'" "su")) @end lisp @noindent See the documentation for the variable @code{tramp-default-method-alist} for more details. External transfer methods are normally preferable to inline transfer methods, giving better performance. @xref{Inline methods}. @xref{External transfer methods}. @xref{Multi-hop Methods}. Another consideration with the selection of transfer methods is the environment you will use them in and, especially when used over the Internet, the security implications of your preferred method. The @option{rsh} and @option{telnet} methods send your password as plain text as you log in to the remote machine, as well as transferring the files in such a way that the content can easily be read from other machines. If you need to connect to remote systems that are accessible from the Internet, you should give serious thought to using @option{ssh} based methods to connect. These provide a much higher level of security, making it a non-trivial exercise for someone to obtain your password or read the content of the files you are editing. @subsection Which method is the right one for me? @cindex choosing the right method Given all of the above, you are probably thinking that this is all fine and good, but it's not helping you to choose a method! Right you are. As a developer, we don't want to boss our users around but give them maximum freedom instead. However, the reality is that some users would like to have some guidance, so here I'll try to give you this guidance without bossing you around. You tell me whether it works @dots{} My suggestion is to use an inline method. For large files, out-of-band methods might be more efficient, but I guess that most people will want to edit mostly small files. I guess that these days, most people can access a remote machine by using @command{ssh}. So I suggest that you use the @option{ssh} method. So, type @kbd{C-x C-f @value{prefix}ssh@value{postfixsinglehop}root@@otherhost@value{postfix}/etc/motd @key{RET}} to edit the @file{/etc/motd} file on the other host. If you can't use @option{ssh} to log in to the remote host, then select a method that uses a program that works. For instance, Windows users might like the @option{plink} method which uses the PuTTY implementation of @command{ssh}. Or you use Kerberos and thus like @option{krlogin}. For the special case of editing files on the local host as another user, see the @option{su} or @option{sudo} methods. They offer shortened syntax for the @samp{root} account, like @file{@value{prefix}su@value{postfixsinglehop}@value{postfix}/etc/motd}. People who edit large files may want to consider @option{scp} instead of @option{ssh}, or @option{pscp} instead of @option{plink}. These out-of-band methods are faster than inline methods for large files. Note, however, that out-of-band methods suffer from some limitations. Please try first whether you really get a noticeable speed advantage from using an out-of-band method! Maybe even for large files, inline methods are fast enough. @node Customizing Methods @section Using Non-Standard Methods @cindex customizing methods @cindex using non-standard methods @cindex create your own methods There is a variable @code{tramp-methods} which you can change if the predefined methods don't seem right. For the time being, I'll refer you to the Lisp documentation of that variable, accessible with @kbd{C-h v tramp-methods @key{RET}}. @node Customizing Completion @section Selecting config files for user/host name completion @cindex customizing completion @cindex selecting config files @vindex tramp-completion-function-alist The variable @code{tramp-completion-function-alist} is intended to customize which files are taken into account for user and host name completion (@pxref{Filename completion}). For every method, it keeps a set of configuration files, accompanied by a Lisp function able to parse that file. Entries in @code{tramp-completion-function-alist} have the form (@var{method} @var{pair1} @var{pair2} ...). Each @var{pair} is composed of (@var{function} @var{file}). @var{function} is responsible to extract user names and host names from @var{file} for completion. There are two functions which access this variable: @defun tramp-get-completion-function method This function returns the list of completion functions for @var{method}. Example: @example (tramp-get-completion-function "rsh") @result{} ((tramp-parse-rhosts "/etc/hosts.equiv") (tramp-parse-rhosts "~/.rhosts")) @end example @end defun @defun tramp-set-completion-function method function-list This function sets @var{function-list} as list of completion functions for @var{method}. Example: @example (tramp-set-completion-function "ssh" '((tramp-parse-sconfig "/etc/ssh_config") (tramp-parse-sconfig "~/.ssh/config"))) @result{} ((tramp-parse-sconfig "/etc/ssh_config") (tramp-parse-sconfig "~/.ssh/config")) @end example @end defun The following predefined functions parsing configuration files exist: @table @asis @item @code{tramp-parse-rhosts} @findex tramp-parse-rhosts This function parses files which are syntactical equivalent to @file{~/.rhosts}. It returns both host names and user names, if specified. @item @code{tramp-parse-shosts} @findex tramp-parse-shosts This function parses files which are syntactical equivalent to @file{~/.ssh/known_hosts}. Since there are no user names specified in such files, it can return host names only. @item @code{tramp-parse-sconfig} @findex tramp-parse-shosts This function returns the host nicknames defined by @code{Host} entries in @file{~/.ssh/config} style files. @item @code{tramp-parse-shostkeys} @findex tramp-parse-shostkeys SSH2 parsing of directories @file{/etc/ssh2/hostkeys/*} and @file{~/ssh2/hostkeys/*}. Hosts are coded in file names @file{hostkey_@var{portnumber}_@var{host-name}.pub}. User names are always @code{nil}. @item @code{tramp-parse-sknownhosts} @findex tramp-parse-shostkeys Another SSH2 style parsing of directories like @file{/etc/ssh2/knownhosts/*} and @file{~/ssh2/knownhosts/*}. This case, hosts names are coded in file names @file{@var{host-name}.@var{algorithm}.pub}. User names are always @code{nil}. @item @code{tramp-parse-hosts} @findex tramp-parse-hosts A function dedicated to @file{/etc/hosts} style files. It returns host names only. @item @code{tramp-parse-passwd} @findex tramp-parse-passwd A function which parses @file{/etc/passwd} like files. Obviously, it can return user names only. @item @code{tramp-parse-netrc} @findex tramp-parse-netrc Finally, a function which parses @file{~/.netrc} like files. @end table If you want to keep your own data in a file, with your own structure, you might provide such a function as well. This function must meet the following conventions: @defun my-tramp-parse file @var{file} must be either a file name on your host, or @code{nil}. The function must return a list of (@var{user} @var{host}), which are taken as candidates for user and host name completion. Example: @example (my-tramp-parse "~/.my-tramp-hosts") @result{} ((nil "toto") ("daniel" "melancholia")) @end example @end defun @node Password caching @section Reusing passwords for several connections. @cindex passwords Sometimes it is necessary to connect to the same remote host several times. Reentering passwords again and again would be annoying, when the choosen method does not support access without password prompt throught own configuration. By default, @value{tramp} caches the passwords entered by you. They will be reused next time if a connection needs them for the same user name and host name, independant of the connection method. @vindex password-cache-expiry Passwords are not saved permanently, that means the password caching is limited to the lifetime of your @value{emacsname} session. You can influence the lifetime of password caching by customizing the variable @code{password-cache-expiry}. The value is the number of seconds how long passwords are cached. Setting it to @code{nil} disables the expiration. @findex tramp-clear-passwd A password is removed from the cache if a connection isn't established successfully. You can remove a password from the cache also by executing @kbd{M-x tramp-clear-passwd} in a buffer containing a related remote file or directory. @vindex password-cache If you don't like this feature for security reasons, password caching can be disabled totally by customizing the variable @code{password-cache} (setting it to @code{nil}). Implementation Note: password caching is based on the package password.el in No Gnus. For the time being, it is activated only when this package is seen in the @code{load-path} while loading @value{tramp}. @ifset installchapter If you don't use No Gnus, you can take password.el from the @value{tramp} @file{contrib} directory, see @ref{Installation parameters}. @end ifset It will be activated mandatory once No Gnus has found its way into @value{emacsname}. @node Remote Programs @section How @value{tramp} finds and uses programs on the remote machine. @value{tramp} depends on a number of programs on the remote host in order to function, including @command{ls}, @command{test}, @command{find} and @command{cat}. In addition to these required tools, there are various tools that may be required based on the connection method. See @ref{Inline methods} and @ref{External transfer methods} for details on these. Certain other tools, such as @command{perl} (or @command{perl5}) and @command{grep} will be used if they can be found. When they are available, they are used to improve the performance and accuracy of remote file access. @vindex tramp-remote-path When @value{tramp} connects to the remote machine, it searches for the programs that it can use. The variable @var{tramp-remote-path} controls the directories searched on the remote machine. By default, this is set to a reasonable set of defaults for most machines. It is possible, however, that your local (or remote ;) system administrator has put the tools you want in some obscure local directory. In this case, you can still use them with @value{tramp}. You simply need to add code to your @file{.emacs} to add the directory to the remote path. This will then be searched by @value{tramp} when you connect and the software found. To add a directory to the remote search path, you could use code such as: @lisp @i{;; We load @value{tramp} to define the variable.} (require 'tramp) @i{;; We have @command{perl} in "/usr/local/perl/bin"} (add-to-list 'tramp-remote-path "/usr/local/perl/bin") @end lisp @node Remote shell setup @comment node-name, next, previous, up @section Remote shell setup hints @cindex remote shell setup @cindex @file{.profile} file @cindex @file{.login} file @cindex shell init files As explained in the @ref{Overview} section, @value{tramp} connects to the remote host and talks to the shell it finds there. Of course, when you log in, the shell executes its init files. Suppose your init file requires you to enter the birth date of your mother; clearly @value{tramp} does not know this and hence fails to log you in to that host. There are different possible strategies for pursuing this problem. One strategy is to enable @value{tramp} to deal with all possible situations. This is a losing battle, since it is not possible to deal with @emph{all} situations. The other strategy is to require you to set up the remote host such that it behaves like @value{tramp} expects. This might be inconvenient because you have to invest a lot of effort into shell setup before you can begin to use @value{tramp}. The package, therefore, pursues a combined approach. It tries to figure out some of the more common setups, and only requires you to avoid really exotic stuff. For example, it looks through a list of directories to find some programs on the remote host. And also, it knows that it is not obvious how to check whether a file exists, and therefore it tries different possibilities. (On some hosts and shells, the command @command{test -e} does the trick, on some hosts the shell builtin doesn't work but the program @command{/usr/bin/test -e} or @command{/bin/test -e} works. And on still other hosts, @command{ls -d} is the right way to do this.) Below you find a discussion of a few things that @value{tramp} does not deal with, and that you therefore have to set up correctly. @table @asis @item @var{shell-prompt-pattern} @vindex shell-prompt-pattern After logging in to the remote host, @value{tramp} has to wait for the remote shell startup to finish before it can send commands to the remote shell. The strategy here is to wait for the shell prompt. In order to recognize the shell prompt, the variable @code{shell-prompt-pattern} has to be set correctly to recognize the shell prompt on the remote host. Note that @value{tramp} requires the match for @code{shell-prompt-pattern} to be at the end of the buffer. Many people have something like the following as the value for the variable: @code{"^[^>$][>$] *"}. Now suppose your shell prompt is @code{a c $ }. In this case, @value{tramp} recognizes the @code{>} character as the end of the prompt, but it is not at the end of the buffer. @item @var{tramp-shell-prompt-pattern} @vindex tramp-shell-prompt-pattern This regular expression is used by @value{tramp} in the same way as @code{shell-prompt-pattern}, to match prompts from the remote shell. This second variable exists because the prompt from the remote shell might be different from the prompt from a local shell --- after all, the whole point of @value{tramp} is to log in to remote hosts as a different user. The default value of @code{tramp-shell-prompt-pattern} is the same as the default value of @code{shell-prompt-pattern}, which is reported to work well in many circumstances. @item @command{tset} and other questions @cindex Unix command tset @cindex tset Unix command Some people invoke the @command{tset} program from their shell startup scripts which asks the user about the terminal type of the shell. Maybe some shells ask other questions when they are started. @value{tramp} does not know how to answer these questions. There are two approaches for dealing with this problem. One approach is to take care that the shell does not ask any questions when invoked from @value{tramp}. You can do this by checking the @code{TERM} environment variable, it will be set to @code{dumb} when connecting. @vindex tramp-terminal-type The variable @code{tramp-terminal-type} can be used to change this value to @code{dumb}. The other approach is to teach @value{tramp} about these questions. See the variables @code{tramp-actions-before-shell} and @code{tramp-multi-actions} (for multi-hop connections). @item Environment variables named like users in @file{.profile} If you have a user named frumple and set the variable @code{FRUMPLE} in your shell environment, then this might cause trouble. Maybe rename the variable to @code{FRUMPLE_DIR} or the like. This weird effect was actually reported by a @value{tramp} user! @item Non-Bourne commands in @file{.profile} After logging in to the remote host, @value{tramp} issues the command @command{exec /bin/sh}. (Actually, the command is slightly different.) When @command{/bin/sh} is executed, it reads some init files, such as @file{~/.shrc} or @file{~/.profile}. Now, some people have a login shell which is not @code{/bin/sh} but a Bourne-ish shell such as bash or ksh. Some of these people might put their shell setup into the files @file{~/.shrc} or @file{~/.profile}. This way, it is possible for non-Bourne constructs to end up in those files. Then, @command{exec /bin/sh} might cause the Bourne shell to barf on those constructs. As an example, imagine somebody putting @command{export FOO=bar} into the file @file{~/.profile}. The standard Bourne shell does not understand this syntax and will emit a syntax error when it reaches this line. Another example is the tilde (@code{~}) character, say when adding @file{~/bin} to @code{$PATH}. Many Bourne shells will not expand this character, and since there is usually no directory whose name consists of the single character tilde, strange things will happen. What can you do about this? Well, one possibility is to make sure that everything in @file{~/.shrc} and @file{~/.profile} on all remote hosts is Bourne-compatible. In the above example, instead of @command{export FOO=bar}, you might use @command{FOO=bar; export FOO} instead. The other possibility is to put your non-Bourne shell setup into some other files. For example, bash reads the file @file{~/.bash_profile} instead of @file{~/.profile}, if the former exists. So bash aficionados just rename their @file{~/.profile} to @file{~/.bash_profile} on all remote hosts, and Bob's your uncle. The @value{tramp} developers would like to circumvent this problem, so if you have an idea about it, please tell us. However, we are afraid it is not that simple: before saying @command{exec /bin/sh}, @value{tramp} does not know which kind of shell it might be talking to. It could be a Bourne-ish shell like ksh or bash, or it could be a csh derivative like tcsh, or it could be zsh, or even rc. If the shell is Bourne-ish already, then it might be prudent to omit the @command{exec /bin/sh} step. But how to find out if the shell is Bourne-ish? @end table @node Auto-save and Backup @section Auto-save and Backup configuration @cindex auto-save @cindex backup @ifset emacs @vindex backup-directory-alist @end ifset @ifset xemacs @vindex bkup-backup-directory-info @end ifset Normally, @value{emacsname} writes backup files to the same directory as the original files, but this behavior can be changed via the variable @ifset emacs @code{backup-directory-alist}. @end ifset @ifset xemacs @code{bkup-backup-directory-info}. @end ifset In connection with @value{tramp}, this can have unexpected side effects. Suppose that you specify that all backups should go to the directory @file{~/.emacs.d/backups/}, and then you edit the file @file{@value{prefix}su@value{postfixsinglehop}root@@localhost@value{postfix}/etc/secretfile}. The effect is that the backup file will be owned by you and not by root, thus possibly enabling others to see it even if they were not intended to see it. When @ifset emacs @code{backup-directory-alist} @end ifset @ifset xemacs @code{bkup-backup-directory-info} @end ifset is @code{nil} (the default), such problems do not occur. Therefore, it is usefull to set special values for @value{tramp} files. For example, the following statement effectively `turns off' the effect of @ifset emacs @code{backup-directory-alist} @end ifset @ifset xemacs @code{bkup-backup-directory-info} @end ifset for @value{tramp} files: @ifset emacs @lisp (add-to-list 'backup-directory-alist (cons tramp-file-name-regexp nil)) @end lisp @end ifset @ifset xemacs @lisp (require 'backup-dir) (add-to-list 'bkup-backup-directory-info (list tramp-file-name-regexp "")) @end lisp @end ifset Another possibility is to use the @value{tramp} variable @ifset emacs @code{tramp-backup-directory-alist}. @end ifset @ifset xemacs @code{tramp-bkup-backup-directory-info}. @end ifset This variable has the same meaning like @ifset emacs @code{backup-directory-alist}. @end ifset @ifset xemacs @code{bkup-backup-directory-info}. @end ifset If a @value{tramp} file is backed up, and DIRECTORY is an absolute local file name, DIRECTORY is prepended with the @value{tramp} file name prefix of the file to be backed up. @noindent Example: @ifset emacs @lisp (add-to-list 'backup-directory-alist (cons "." "~/.emacs.d/backups/")) (setq tramp-backup-directory-alist backup-directory-alist) @end lisp @end ifset @ifset xemacs @lisp (require 'backup-dir) (add-to-list 'bkup-backup-directory-info (list "." "~/.emacs.d/backups/" 'full-path)) (setq tramp-bkup-backup-directory-info bkup-backup-directory-info) @end lisp @end ifset @noindent The backup file name of @file{@value{prefix}su@value{postfixsinglehop}root@@localhost@value{postfix}/etc/secretfile} would be @ifset emacs @file{@value{prefix}su@value{postfixsinglehop}root@@localhost@value{postfix}~/.emacs.d/backups/!su:root@@localhost:!etc!secretfile~} @end ifset @ifset xemacs @file{@value{prefix}su@value{postfixsinglehop}root@@localhost@value{postfix}~/.emacs.d/backups/![su!root@@localhost]!etc!secretfile~} @end ifset The same problem can happen with auto-saving files. @ifset emacs Since @value{emacsname} 21, the variable @code{auto-save-file-name-transforms} keeps information, on which directory an auto-saved file should go. By default, it is initialized for @value{tramp} files to the local temporary directory. On some versions of @value{emacsname}, namely the version built for Debian GNU/Linux, the variable @code{auto-save-file-name-transforms} contains the directory where @value{emacsname} was built. A workaround is to manually set the variable to a sane value. If auto-saved files should go into the same directory as the original files, @code{auto-save-file-name-transforms} should be set to @code{nil}. Another possibility is to set the variable @code{tramp-auto-save-directory} to a proper value. @end ifset @ifset xemacs For this purpose you can set the variable @code{auto-save-directory} to a proper value. @end ifset @node Windows setup hints @section Issues with Cygwin ssh @cindex Cygwin, issues This section needs a lot of work! Please help. @cindex method sshx with Cygwin @cindex sshx method with Cygwin The recent Cygwin installation of @command{ssh} works only with a Cygwinized @value{emacsname}. You can check it by typing @kbd{M-x eshell}, and starting @kbd{ssh test.machine}. The problem is evident if you see a message like this: @example Pseudo-terminal will not be allocated because stdin is not a terminal. @end example Older @command{ssh} versions of Cygwin are told to cooperate with @value{tramp} selecting @option{sshx} as the connection method. You can find information about setting up Cygwin in their FAQ at @uref{http://cygwin.com/faq/}. @cindex method scpx with Cygwin @cindex scpx method with Cygwin If you wish to use the @option{scpx} connection method, then you might have the problem that @value{emacsname} calls @command{scp} with a Windows filename such as @code{c:/foo}. The Cygwin version of @command{scp} does not know about Windows filenames and interprets this as a remote filename on the host @code{c}. One possible workaround is to write a wrapper script for @option{scp} which converts the Windows filename to a Cygwinized filename. @cindex Cygwin and ssh-agent @cindex SSH_AUTH_SOCK and @value{emacsname} on Windows If you want to use either @option{ssh} based method on Windows, then you might encounter problems with @command{ssh-agent}. Using this program, you can avoid typing the pass-phrase every time you log in. However, if you start @value{emacsname} from a desktop shortcut, then the environment variable @code{SSH_AUTH_SOCK} is not set and so @value{emacsname} and thus @value{tramp} and thus @command{ssh} and @command{scp} started from @value{tramp} cannot communicate with @command{ssh-agent}. It works better to start @value{emacsname} from the shell. If anyone knows how to start @command{ssh-agent} under Windows in such a way that desktop shortcuts can profit, please holler. I don't really know anything at all about Windows@dots{} @node Usage @chapter Using @value{tramp} @cindex using @value{tramp} Once you have installed @value{tramp} it will operate fairly transparently. You will be able to access files on any remote machine that you can log in to as though they were local. Files are specified to @value{tramp} using a formalized syntax specifying the details of the system to connect to. This is similar to the syntax used by the @value{ftppackagename} package. @cindex type-ahead Something that might happen which surprises you is that @value{emacsname} remembers all your keystrokes, so if you see a password prompt from @value{emacsname}, say, and hit @kbd{@key{RET}} twice instead of once, then the second keystroke will be processed by @value{emacsname} after @value{tramp} has done its thing. Why, this type-ahead is normal behavior, you say. Right you are, but be aware that opening a remote file might take quite a while, maybe half a minute when a connection needs to be opened. Maybe after half a minute you have already forgotten that you hit that key! @menu * Filename Syntax:: @value{tramp} filename conventions. * Multi-hop filename syntax:: Multi-hop filename conventions. * Filename completion:: Filename completion. * Dired:: Dired. * Compilation:: Compile remote files. @end menu @node Filename Syntax @section @value{tramp} filename conventions @cindex filename syntax @cindex filename examples To access the file @var{localname} on the remote machine @var{machine} you would specify the filename @file{@value{prefix}@var{machine}@value{postfix}@var{localname}}. This will connect to @var{machine} and transfer the file using the default method. @xref{Default Method}. Some examples of @value{tramp} filenames are shown below. @table @file @item @value{prefix}melancholia@value{postfix}.emacs Edit the file @file{.emacs} in your home directory on the machine @code{melancholia}. @item @value{prefix}melancholia.danann.net@value{postfix}.emacs This edits the same file, using the fully qualified domain name of the machine. @item @value{prefix}melancholia@value{postfix}~/.emacs This also edits the same file --- the @file{~} is expanded to your home directory on the remote machine, just like it is locally. @item @value{prefix}melancholia@value{postfix}~daniel/.emacs This edits the file @file{.emacs} in the home directory of the user @code{daniel} on the machine @code{melancholia}. The @file{~} construct is expanded to the home directory of that user on the remote machine. @item @value{prefix}melancholia@value{postfix}/etc/squid.conf This edits the file @file{/etc/squid.conf} on the machine @code{melancholia}. @end table Unless you specify a different name to use, @value{tramp} will use the current local user name as the remote user name to log in with. If you need to log in as a different user, you can specify the user name as part of the filename. To log in to the remote machine as a specific user, you use the syntax @file{@value{prefix}@var{user}@@@var{machine}@value{postfix}/@var{path/to.file}}. That means that connecting to @code{melancholia} as @code{daniel} and editing @file{.emacs} in your home directory you would specify @file{@value{prefix}daniel@@melancholia@value{postfix}.emacs}. It is also possible to specify other file transfer methods (@pxref{Default Method}) as part of the filename. @ifset emacs This is done by putting the method before the user and host name, as in @file{@value{prefix}@var{method}@value{postfixsinglehop}} (Note the trailing colon). @end ifset @ifset xemacs This is done by replacing the initial @file{@value{prefix}} with @file{@value{prefix}@value{postfixsinglehop}}. (Note the trailing slash!). @end ifset The user, machine and file specification remain the same. So, to connect to the machine @code{melancholia} as @code{daniel}, using the @option{ssh} method to transfer files, and edit @file{.emacs} in my home directory I would specify the filename @file{@value{prefix}ssh@value{postfixsinglehop}daniel@@melancholia@value{postfix}.emacs}. @node Multi-hop filename syntax @section Multi-hop filename conventions @cindex filename syntax for multi-hop files @cindex multi-hop filename syntax The syntax of multi-hop file names is necessarily slightly different than the syntax of other @value{tramp} file names. Here's an example multi-hop file name: @example @value{prefix}multi@value{postfixsinglehop}rsh@value{postfixmultihop}out@@gate@value{postfixsinglehop}telnet@value{postfixmultihop}kai@@real.host@value{postfix}/path/to.file @end example This is quite a mouthful. So let's go through it step by step. The file name consists of three parts. @ifset emacs The parts are separated by colons @end ifset @ifset xemacs The parts are separated by slashes and square brackets. @end ifset The first part is @file{@value{prefix}multi}, the method specification. The second part is @file{rsh@value{postfixmultihop}out@@gate@value{postfixsinglehop}telnet@value{postfixmultihop}kai@@real.host} and specifies the hops. The final part is @file{/path/to.file} and specifies the file name on the remote host. The first part and the final part should be clear. See @ref{Multi-hop Methods}, for a list of alternatives for the method specification. The second part can be subdivided again into components, so-called hops. In the above file name, there are two hops, @file{rsh@value{postfixmultihop}out@@gate} and @file{telnet@value{postfixmultihop}kai@@real.host}. Each hop can @emph{again} be subdivided into (three) components, the @dfn{hop method}, the @dfn{user name} and the @dfn{host name}. The meaning of the second and third component should be clear, and the hop method says what program to use to perform that hop. The first hop, @file{rsh@value{postfixmultihop}out@@gate}, says to use @command{rsh} to log in as user @code{out} to the host @code{gate}. Starting at that host, the second hop, @file{telnet@value{postfixmultihop}kai@@real.host}, says to use @command{telnet} to log in as user @code{kai} to host @code{real.host}. @xref{Multi-hop Methods}, for a list of possible hop method values. The variable @code{tramp-multi-connection-function-alist} contains the list of possible hop methods and information on how to execute them, should you want to add your own. @node Filename completion @section Filename completion @cindex filename completion Filename completion works with @value{tramp} for both completing methods, user names and machine names (except multi hop methods) as well as for files on remote machines. If you, for example, type @kbd{C-x C-f @value{prefix}t @key{TAB}}, @value{tramp} might give you as result the choice for @example @ifset emacs @value{prefixsinglehop}telnet@value{postfixsinglehop} tmp/ @value{prefixsinglehop}toto@value{postfix} @end ifset @ifset xemacs @value{prefixsinglehop}telnet@value{postfixsinglehop} @value{prefixsinglehop}toto@value{postfix} @end ifset @end example @samp{@value{prefixsinglehop}telnet@value{postfixsinglehop}} is a possible completion for the respective method, @ifset emacs @samp{tmp/} stands for the directory @file{/tmp} on your local machine, @end ifset and @samp{@value{prefixsinglehop}toto@value{postfix}} might be a host @value{tramp} has detected in your @file{~/.ssh/known_hosts} file (given you're using default method @option{ssh}). If you go on to type @kbd{e @key{TAB}}, the minibuffer is completed to @samp{@value{prefix}telnet@value{postfixsinglehop}}. Next @kbd{@key{TAB}} brings you all machine names @value{tramp} detects in your @file{/etc/hosts} file, let's say @example @value{prefixsinglehop}telnet@value{postfixsinglehop}127.0.0.1@value{postfix} @value{prefixsinglehop}telnet@value{postfixsinglehop}192.168.0.1@value{postfix} @value{prefixsinglehop}telnet@value{postfixsinglehop}localhost@value{postfix} @value{prefixsinglehop}telnet@value{postfixsinglehop}melancholia.danann.net@value{postfix} @value{prefixsinglehop}telnet@value{postfixsinglehop}melancholia@value{postfix} @end example Now you can choose the desired machine, and you can continue to complete file names on that machine. As filename completion needs to fetch the listing of files from the remote machine, this feature is sometimes fairly slow. As @value{tramp} does not yet cache the results of directory listing, there is no gain in performance the second time you complete filenames. If the configuration files (@pxref{Customizing Completion}), which @value{tramp} uses for analysis of completion, offer user names, those user names will be taken into account as well. @node Dired @section Dired @cindex dired @value{tramp} works transparently with dired, enabling you to use this powerful file management tool to manage files on any machine you have access to over the Internet. If you need to browse a directory tree, Dired is a better choice, at present, than filename completion. Dired has its own cache mechanism and will only fetch the directory listing once. @node Compilation @section Compile remote files @cindex compile @cindex recompile @value{tramp} provides commands for compilation of files on remote machines. In order to get them loaded, you need to require @file{tramp-util.el}: @lisp (require 'tramp-util) @end lisp Afterwards, you can use the commands @code{tramp-compile} and @code{tramp-recompile} instead of @code{compile} and @code{recompile}, respectively; @inforef{Compilation, ,@value{emacsdir}}. This does not work for the @option{ftp} and @option{smb} methods. The corresponding key bindings and menu entries calling these commands are redefined automatically for buffers associated with remote files. After finishing the compilation, you can use the usual commands like @code{previous-error}, @code{next-error} and @code{first-error} for navigation in the @file{*Compilation*} buffer. @node Bug Reports @chapter Reporting Bugs and Problems @cindex bug reports Bugs and problems with @value{tramp} are actively worked on by the development team. Feature requests and suggestions are also more than welcome. The @value{tramp} mailing list is a great place to get information on working with @value{tramp}, solving problems and general discussion and advice on topics relating to the package. The mailing list is at @email{tramp-devel@@gnu.org}. Messages sent to this address go to all the subscribers. This is @emph{not} the address to send subscription requests to. Subscribing to the list is performed via @uref{http://lists.gnu.org/mailman/listinfo/tramp-devel/, the @value{tramp} Mail Subscription Page}. To report a bug in @value{tramp}, you should execute @kbd{M-x tramp-bug}. This will automatically generate a buffer with the details of your system and @value{tramp} version. When submitting a bug report, please try to describe in excruciating detail the steps required to reproduce the problem, the setup of the remote machine and any special conditions that exist. If you can identify a minimal test case that reproduces the problem, include that with your bug report. This will make it much easier for the development team to analyze and correct the problem. @node Frequently Asked Questions @chapter Frequently Asked Questions @cindex frequently asked questions @cindex FAQ @itemize @bullet @item Where can I get the latest @value{tramp}? @value{tramp} is available under the URL below. @noindent @uref{http://ftp.gnu.org/gnu/tramp/} @noindent There is also a Savannah project page. @noindent @uref{http://savannah.gnu.org/projects/tramp/} @item Which systems does it work on? The package has been used successfully on GNU Emacs 20, GNU Emacs 21 and GNU Emacs 22, as well as XEmacs 21. XEmacs 20 is more problematic, see the notes in @file{tramp.el}. I don't think anybody has really tried it on GNU Emacs 19. The package was intended to work on Unix, and it really expects a Unix-like system on the remote end (except the @option{smb} method), but some people seemed to have some success getting it to work on MS Windows NT/2000/XP @value{emacsname}. There is some informations on @value{tramp} on NT at the following URL; many thanks to Joe Stoy for providing the information: @uref{ftp://ftp.comlab.ox.ac.uk/tmp/Joe.Stoy/} @c The link is broken. I've contacted Tom for clarification. Michael. @ignore The above mostly contains patches to old ssh versions; Tom Roche has a Web page with instructions: @uref{http://www4.ncsu.edu/~tlroche/plinkTramp.html} @end ignore ??? Is the XEmacs info correct? ??? Can somebody provide some information for getting it to work on NT Emacs? I think there was some issue with @command{ssh}? @item I can't stop @value{ftppackagename} starting with @value{emacsname} @ifset emacs @value{ftppackagename} is loaded from @value{tramp} automatically if you require a file by the ftp method. Unfortunately, there are some Lisp packages which make @value{ftppackagename} file name handlers active. You can see it applying @kbd{C-h v file-name-handler-alist}: @example file-name-handler-alist's value is (("^/[^/:]*\\'" . ange-ftp-completion-hook-function) ("^/[^/:]*[^/:.]:" . ange-ftp-hook-function) ("^/[^/]*$" . tramp-completion-file-name-handler) ("\\`/[^/:]+:" . tramp-file-name-handler) ("\\`/:" . file-name-non-special)) @end example Please try to find out which package is responsible for loading @value{ftppackagename}, and raise a bug report. A workaround is to require @value{ftppackagename} before @value{tramp} in your @file{~/.emacs}, because @value{tramp} cleans up the entries in @code{file-name-handler-alist}: @lisp ;; @value{ftppackagename} temporarily required (require 'ange-ftp) ;; @value{tramp} cleans up @code{file-name-handler-alist} (require 'tramp) @end lisp @end ifset @ifset xemacs Not all the older versions of @value{tramp} supported @value{emacsname} correctly. The first thing to do is to make sure that you have the latest version of @value{tramp} installed. If you do, please try and find out exactly the conditions required for the @value{ftppackagename} handlers to fire. If you can, putting a breakpoint on @code{efs-ftp-path} and sending in the stack trace along with your bug report would make it easier for the developers to work out what is going wrong. @end ifset @item File name completion does not work with @value{tramp} When you log in to the remote machine, do you see the output of @command{ls} in color? If so, this may be the cause of your problems. @command{ls} outputs @acronym{ANSI} escape sequences that your terminal emulator interprets to set the colors. These escape sequences will confuse @value{tramp} however. In your @file{.bashrc}, @file{.profile} or equivalent on the remote machine you probably have an alias configured that adds the option @option{--color=yes} or @option{--color=auto}. You should remove that alias and ensure that a new login @emph{does not} display the output of @command{ls} in color. If you still cannot use filename completion, report a bug to the @value{tramp} developers. @item File name completion does not work in large directories @value{tramp} uses globbing for some operations. (Globbing means to use the shell to expand wildcards such as `*.c'.) This might create long command lines, especially in directories with many files. Some shells choke on long command lines, or don't cope well with the globbing itself. If you have a large directory on the remote end, you may wish to execute a command like @samp{ls -d * ..?* > /dev/null} and see if it hangs. Note that you must first start the right shell, which might be @command{/bin/sh}, @command{ksh} or @command{bash}, depending on which of those supports tilde expansion. @item How can I get notified when @value{tramp} file transfers are complete? The following snippet can be put in your @file{~/.emacs} file. It makes @value{emacsname} beep after reading from or writing to the remote host. @lisp (defadvice tramp-handle-write-region (after tramp-write-beep-advice activate) " make tramp beep after writing a file." (interactive) (beep)) (defadvice tramp-handle-do-copy-or-rename-file (after tramp-copy-beep-advice activate) " make tramp beep after copying a file." (interactive) (beep)) (defadvice tramp-handle-insert-file-contents (after tramp-copy-beep-advice activate) " make tramp beep after copying a file." (interactive) (beep)) @end lisp @item There's this @file{~/.sh_history} file on the remote host which keeps growing and growing. What's that? Sometimes, @value{tramp} starts @command{ksh} on the remote host for tilde expansion. Maybe @command{ksh} saves the history by default. @value{tramp} tries to turn off saving the history, but maybe you have to help. For example, you could put this in your @file{.kshrc}: @example if [ -f $HOME/.sh_history ] ; then /bin/rm $HOME/.sh_history fi if [ "$@{HISTFILE-unset@}" != "unset" ] ; then unset HISTFILE fi if [ "$@{HISTSIZE-unset@}" != "unset" ] ; then unset HISTSIZE fi @end example @item @value{tramp} doesn't transfer strings with more than 500 characters correctly On some few systems, the implementation of @code{process-send-string} seems to be broken for longer strings. This case, you should customize the variable @code{tramp-chunksize} to 500. For a description how to determine whether this is necessary see the documentation of @code{tramp-chunksize}. @end itemize @c For the developer @node Version Control @chapter The inner workings of remote version control @cindex Version Control Unlike @value{ftppackagename}, @value{tramp} has full shell access to the remote machine. This makes it possible to provide version control for files accessed under @value{tramp}. The actual version control binaries must be installed on the remote machine, accessible in the directories specified in @var{tramp-remote-path}. This transparent integration with the version control systems is one of the most valuable features provided by @value{tramp}, but it is far from perfect. Work is ongoing to improve the transparency of the system. @menu * Version Controlled Files:: Determining if a file is under version control. * Remote Commands:: Executing the version control commands on the remote machine. * Changed workfiles:: Detecting if the working file has changed. * Checking out files:: Bringing the workfile out of the repository. * Miscellaneous Version Control:: Things related to Version Control that don't fit elsewhere. @end menu @node Version Controlled Files @section Determining if a file is under version control The VC package uses the existence of on-disk revision control master files to determine if a given file is under revision control. These file tests happen on the remote machine through the standard @value{tramp} mechanisms. @node Remote Commands @section Executing the version control commands on the remote machine There are no hooks provided by VC to allow intercepting of the version control command execution. The calls occur through the @code{call-process} mechanism, a function that is somewhat more efficient than the @code{shell-command} function but that does not provide hooks for remote execution of commands. To work around this, the functions @code{vc-do-command} and @code{vc-simple-command} have been advised to intercept requests for operations on files accessed via @value{tramp}. In the case of a remote file, the @code{shell-command} interface is used, with some wrapper code, to provide the same functionality on the remote machine as would be seen on the local machine. @node Changed workfiles @section Detecting if the working file has changed As there is currently no way to get access to the mtime of a file on a remote machine in a portable way, the @code{vc-workfile-unchanged-p} function is advised to call an @value{tramp} specific function for remote files. The @code{tramp-vc-workfile-unchanged-p} function uses the functioning VC diff functionality to determine if any changes have occurred between the workfile and the version control master. This requires that a shell command be executed remotely, a process that is notably heavier-weight than the mtime comparison used for local files. Unfortunately, unless a portable solution to the issue is found, this will remain the cost of remote version control. @node Checking out files @section Bringing the workfile out of the repository VC will, by default, check for remote files and refuse to act on them when checking out files from the repository. To work around this problem, the function @code{vc-checkout} knows about @value{tramp} files and allows version control to occur. @node Miscellaneous Version Control @section Things related to Version Control that don't fit elsewhere Minor implementation details, &c. @menu * Remote File Ownership:: How VC determines who owns a workfile. * Back-end Versions:: How VC determines what release your RCS is. @end menu @node Remote File Ownership @subsection How VC determines who owns a workfile @value{emacsname} provides the @code{user-full-name} function to return the login name of the current user as well as mapping from arbitrary user id values back to login names. The VC code uses this functionality to map from the uid of the owner of a workfile to the login name in some circumstances. This will not, for obvious reasons, work if the remote system has a different set of logins. As such, it is necessary to delegate to the remote machine the job of determining the login name associated with a uid. Unfortunately, with the profusion of distributed management systems such as @code{NIS}, @code{NIS+} and @code{NetInfo}, there is no simple, reliable and portable method for performing this mapping. Thankfully, the only place in the VC code that depends on the mapping of a uid to a login name is the @code{vc-file-owner} function. This returns the login of the owner of the file as a string. This function has been advised to use the output of @command{ls} on the remote machine to determine the login name, delegating the problem of mapping the uid to the login to the remote system which should know more about it than I do. @node Back-end Versions @subsection How VC determines what release your RCS is VC needs to know what release your revision control binaries you are running as not all features VC supports are available with older versions of @command{rcs(1)}, @command{cvs(1)} or @command{sccs(1)}. The default implementation of VC determines this value the first time it is needed and then stores the value globally to avoid the overhead of executing a process and parsing its output each time the information is needed. Unfortunately, life is not quite so easy when remote version control comes into the picture. Each remote machine may have a different version of the version control tools and, while this is painful, we need to ensure that unavailable features are not used remotely. To resolve this issue, @value{tramp} currently takes the sledgehammer approach of making the release values of the revision control tools local to each @value{tramp} buffer, forcing VC to determine these values again each time a new file is visited. This has, quite obviously, some performance implications. Thankfully, most of the common operations performed by VC do not actually require that the remote version be known. This makes the problem far less apparent. Eventually these values will be captured by @value{tramp} on a system by system basis and the results cached to improve performance. @node Files directories and localnames @chapter How file names, directories and localnames are mangled and managed. @menu * Localname deconstruction:: Breaking a localname into its components. @end menu @node Localname deconstruction @section Breaking a localname into its components. @value{tramp} file names are somewhat different, obviously, to ordinary file names. As such, the lisp functions @code{file-name-directory} and @code{file-name-nondirectory} are overridden within the @value{tramp} package. Their replacements are reasonably simplistic in their approach. They dissect the filename, call the original handler on the localname and then rebuild the @value{tramp} file name with the result. This allows the platform specific hacks in the original handlers to take effect while preserving the @value{tramp} file name information. @node Issues @chapter Debatable Issues and What Was Decided @itemize @bullet @item The uuencode method does not always work. Due to the design of @value{tramp}, the encoding and decoding programs need to read from stdin and write to stdout. On some systems, @command{uudecode -o -} will read stdin and write the decoded file to stdout, on other systems @command{uudecode -p} does the same thing. But some systems have uudecode implementations which cannot do this at all---it is not possible to call these uudecode implementations with suitable parameters so that they write to stdout. Of course, this could be circumvented: the @code{begin foo 644} line could be rewritten to put in some temporary file name, then @command{uudecode} could be called, then the temp file could be printed and deleted. But I have decided that this is too fragile to reliably work, so on some systems you'll have to do without the uuencode methods. @item @value{tramp} does not work on XEmacs 20. This is because it requires the macro @code{with-timeout} which does not appear to exist in XEmacs 20. I'm somewhat reluctant to add an emulation macro to @value{tramp}, but if somebody who uses XEmacs 20 steps forward and wishes to implement and test it, please contact me or the mailing list. @item The @value{tramp} filename syntax differs between GNU Emacs and XEmacs. The GNU Emacs maintainers wish to use a unified filename syntax for Ange-FTP and @value{tramp} so that users don't have to learn a new syntax. It is sufficient to learn some extensions to the old syntax. For the XEmacs maintainers, the problems caused from using a unified filename syntax are greater than the gains. The XEmacs package system uses EFS for downloading new packages. So, obviously, EFS has to be installed from the start. If the filenames were unified, @value{tramp} would have to be installed from the start, too. @ifset xemacs @strong{Note:} If you'ld like to use a similar syntax like @value{ftppackagename}, you need the following settings in your init file: @lisp (setq tramp-unified-filenames t) (require 'tramp) @end lisp The autoload of the @value{emacsname} @value{tramp} package must be disabled. This can be achieved by setting file permissions @code{000} to the files @file{.../xemacs-packages/lisp/tramp/auto-autoloads.el*}. In case of unified filenames, all @value{emacsname} download sites are added to @code{tramp-default-method-alist} with default method @option{ftp} @xref{Default Method}. These settings shouldn't be touched for proper working of the @value{emacsname} package system. The syntax for unified filenames is described in the @value{tramp} manual for @value{emacsothername}. @end ifset @end itemize @node Concept Index @comment node-name, next, previous, up @unnumbered Concept Index @printindex cp @contents @c End of tramp.texi - the TRAMP User Manual @bye @c TODO @c @c * Say something about the .login and .profile files of the remote @c shells. @c * Explain how tramp.el works in principle: open a shell on a remote @c host and then send commands to it. @c * Mention that bookmarks are a cool feature to go along with Tramp. @c * Make terminology "inline" vs "out-of-band" consistent. @c It seems that "external" is also used instead of "out-of-band". @c * M. Albinus @c ** Use `filename' resp. `file name' consistently. @c ** Use `host' resp. `machine' consistently. @c ** Consistent small or capitalized words especially in menues. @ignore arch-tag: f96dd66e-6dd3-4c92-8d77-9c56205ba808 @end ignore