BSD 2.11 - man page for fastboot (bsd section 8)

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REBOOT(8)										REBOOT(8)

NAME
       reboot - stopping and restarting the system

SYNOPSIS
       /sbin/reboot [ -lqnhdarsfRD ]
       /sbin/halt [ -lqndars ]
       /sbin/fastboot [ -lqndarsRD ]

DESCRIPTION
       2.11BSD	is started by placing it in memory at location zero and transferring to its entry
       point.  Since the system is not reentrant, it is necessary to read it in from disk or tape
       each time it is to be boot strapped.

       Rebooting  a  running  system:  When  the system is running and a reboot is desired, shut-
       down(8) is normally used to stop time sharing and put the system into  single  user  mode.
       If  there  are  no  users  then	/sbin/reboot can be used without shutting the system down
       first.

       Reboot normally causes the disks to be synced and allows the system to perform other shut-
       down  activities such as resynchronizing hardware time-of-day clocks.  A multi-user reboot
       (as described below) is then initiated.	This causes a system to be booted  and	an  auto-
       matic  disk  check  to be performed.  If all this succeeds without incident, the system is
       then brought up for multi-user operation.

       Options to reboot are:

       -l     Don't try to tell syslogd(8) what's about to happen.

       -q     Reboot quickly and ungracefully, without shutting down running processes first.

       -n     Don't sync before rebooting.  This can be used if a disk or  the	processor  is  on
	      fire.

       -h     Don't reboot, simply halt the processor.

       -d     Dump memory onto the dump device, usually part of swap, before rebooting.  The dump
	      is done in the same way as after a panic.

       -a     Have the system booter ask for the name of the system to	be  booted,  rather  than
	      immediately booting the default system (/unix).

       -r     Mount  the root file system as read only when the system reboots.  This is not sup-
	      ported by the kernel in 2.11BSD.

       -s     Don't enter multi-user mode after system has rebooted - stay in single user mode.

       -f     Fast reboot.  Omit the automatic file system  consistency  check	when  the  system
	      reboots and goes multi-user.  This is accomplished by passing a fast reboot flag on
	      to the rebooting kernel.	This currently prevents the use of -f flag in conjunction
	      with the -h (halt) flag.

       -D     Set  the	autoconfig(8) debug flag.  This is normally not used unless one is debug-
	      ging the autoconfig program.

       -R     Tells the kernel to use the compiled in root device.  Normally the system uses  the
	      device from which it was booted as the root/swap/pipe/dump device.

       Reboot normally places a shutdown record in the login accounting file /usr/adm/wtmp.  This
       is inhibited if the -q or -n options are present.  Note that the -f (fast reboot)  and  -n
       (don't  sync)  options are contradictory; the request for a fast reboot is ignored in this
       case.

       Halt and fastboot are synonymous with ``reboot -h'' and ``reboot -f'', respectively.

       Power fail and crash recovery: Normally, the system will  reboot  itself  at  power-up  or
       after crashes if the contents of low memory are intact.	An automatic consistency check of
       the file systems will be performed, and unless this fails, the system will  resume  multi-
       user operations.

SEE ALSO
       autoconfig(8), sync(2), utmp(8), shutdown(8), syslogd(8)

3rd Berkeley Distribution		   May 24, 1996 				REBOOT(8)
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