diff options
author | gordon <gordon@FreeBSD.org> | 2002-11-04 17:35:22 +0000 |
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committer | gordon <gordon@FreeBSD.org> | 2002-11-04 17:35:22 +0000 |
commit | 4a4afa18bb71ec1040123b5649b90e8c4aa20703 (patch) | |
tree | fb8c1c0d20045729db74768ea10fe883505d43f7 /sbin/reboot | |
parent | a47cf32c4fec9309af8945f15a5d4cc7d3ca0f42 (diff) | |
download | FreeBSD-src-4a4afa18bb71ec1040123b5649b90e8c4aa20703.zip FreeBSD-src-4a4afa18bb71ec1040123b5649b90e8c4aa20703.tar.gz |
Add a nextboot manual page.
Spotted by: brandt@fokus.gmd.de
Diffstat (limited to 'sbin/reboot')
-rw-r--r-- | sbin/reboot/nextboot.8 | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/sbin/reboot/nextboot.8 b/sbin/reboot/nextboot.8 new file mode 100644 index 0000000..614275e --- /dev/null +++ b/sbin/reboot/nextboot.8 @@ -0,0 +1,116 @@ +.\" 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 alernate 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 it's 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. |