mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-18 10:35:55 +00:00
117 lines
3.5 KiB
Groff
117 lines
3.5 KiB
Groff
.\" Copyright (c) 2002 Gordon Tetlow
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.\" Note: The date here should be updated whenever a non-trivial
|
|
.\" change is made to the manual page.
|
|
.Dd November 4, 2002
|
|
.Dt NEXTBOOT 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm nextboot
|
|
.Nd specify an alternate kernel and boot flags for the next reboot
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl f
|
|
.Op Fl o Ar options
|
|
.Fl k Ar kernel
|
|
.Nm
|
|
.Fl D
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility allows specifying an alternate kernel and/or boot flags for the
|
|
next time the machine is booted. Once the loader loads in the new kernel
|
|
information, it is deleted so in case the new kernel hangs the machine,
|
|
once it is rebooted, the machine will automatically revert to its previous
|
|
configuration.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width ".Fl o Ar options"
|
|
.It Fl D
|
|
Invoking
|
|
.Nm
|
|
with the
|
|
.Fl D
|
|
option removes an existing nextboot configuration.
|
|
.It Fl f
|
|
The
|
|
.Fl f
|
|
option disables the sanity checking which checks if the kernel really exists
|
|
before writing the nextboot configuration.
|
|
.It Fl k Ar kernel
|
|
The
|
|
.Fl k
|
|
option with required kernel argument specifies a kernel directory relative to
|
|
.Pa /boot
|
|
to load the kernel and any modules from.
|
|
.It Fl o Ar options
|
|
The
|
|
.Fl o
|
|
allows the passing of kernel flags for the nextboot.
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width ".Pa /boot/nextboot.conf" -compact
|
|
.It Pa /boot/nextboot.conf
|
|
The configuration file that the nextboot configuration is written into.
|
|
.El
|
|
.Sh EXAMPLES
|
|
To boot the GENERIC kernel with the
|
|
.Nm
|
|
command:
|
|
.Pp
|
|
.Dl "nextboot -k GENERIC"
|
|
.Pp
|
|
To enable into single user mode with the normal kernel:
|
|
.Pp
|
|
.Dl "nextboot -o ""-s"" -k kernel"
|
|
.Pp
|
|
To remove an existing nextboot configuration:
|
|
.Pp
|
|
.Dl "nextboot -D"
|
|
.Sh SEE ALSO
|
|
.Xr boot 8 ,
|
|
.Xr loader 8
|
|
.Sh HISTORY
|
|
The original
|
|
.Nm
|
|
manual page first appeared in
|
|
.Fx 2.2 .
|
|
It used a very different interface to achieve similar results.
|
|
.Pp
|
|
The current incarnation of
|
|
.Nm
|
|
appeared in
|
|
.Fx 5.0 .
|
|
.Sh AUTHORS
|
|
This manual page was written by
|
|
.An Gordon Tetlow Aq gordon@FreeBSD.org .
|
|
.Sh BUGS
|
|
The nextboot code is implemented in the loader. It is not the most throughly
|
|
tested code. It is also my first attempt to write in Forth.
|
|
.Pp
|
|
Finally, it does some evil things like writing to the filesystem before it
|
|
has been checked. If it scrambles your filesystem, don't blame me.
|