nextboot(8)
NAME
- nextboot - specify an alternate kernel and boot flags for
- the next reboot
SYNOPSIS
nextboot [-f] [-o options] -k kernel
nextboot -D
DESCRIPTION
- The nextboot utility allows specifying an alternate kernel
- and/or boot
flags for the next time the machine is booted. Once the
- loader(8) 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 au
- tomatically
revert to its previous configuration.
- The options are as follows:
- -D Invoking nextboot with this option removes
- an existing
- nextboot configuration.
- -f This option disables the sanity checking
- which checks
- if the kernel really exists before writing
- the nextboot
configuration.
- -k kernel This option specifies a kernel directory
- relative to
- /boot to load the kernel and any modules
- from.
- -o options This option allows the passing of kernel
- flags for the
- next boot.
FILES
- /boot/nextboot.conf The configuration file that the
- nextboot config
- uration is written into.
EXAMPLES
- To boot the GENERIC kernel with the nextboot command:
- nextboot -k GENERIC
- To enable into single user mode with the normal kernel:
nextboot -o "-s" -k kernel- To remove an existing nextboot configuration:
nextboot -D
SEE ALSO
boot(8), loader(8)
HISTORY
- The original nextboot manual page first appeared in FreeBSD
- 2.2. It used
a very different interface to achieve similar results.
- The current incarnation of nextboot appeared in FreeBSD 5.0.
AUTHORS
- This manual page was written by Gordon Tetlow <gordon@FreeB
- SD.org>.
BUGS
- The nextboot code is implemented in the loader(8). It is
- not the most
throughly tested code. It is also my first attempt to write
- in Forth.
- Finally, it does some evil things like writing to the file
- system before
it has been checked. If it scrambles your file system, do
- not blame me.
- BSD November 4, 2002