How to exit from Linux ? Post: 826

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LEARN ABOUT REDHAT

halt

HALT(8) 						Linux System Administrator's Manual						   HALT(8)

NAME

       halt, reboot, poweroff - stop the system.

SYNOPSIS

       /sbin/halt [-n] [-w] [-d] [-f] [-i] [-p] [-h]
       /sbin/reboot [-n] [-w] [-d] [-f] [-i]
       /sbin/poweroff [-n] [-w] [-d] [-f] [-i] [-h]

DESCRIPTION

       Halt  notes  that  the system is being brought down in the file /var/log/wtmp, and then either tells the kernel to halt, reboot or poweroff
       the system.

       If halt or reboot is called when the system is not in runlevel 0 or 6, in other words when it's running normally, shutdown will be  invoked
       instead (with the -h or -r flag). For more info see the shutdown(8) manpage.

       The rest of this manpage describes the behaviour in runlevels 0 and 6, that is when the systems shutdown scripts are being run.

OPTIONS

       -n     Don't sync before reboot or halt.

       -w     Don't actually reboot or halt but only write the wtmp record (in the /var/log/wtmp file).

       -d     Don't write the wtmp record. The -n flag implies -d.

       -f     Force halt or reboot, don't call shutdown(8).

       -i     Shut down all network interfaces just before halt or reboot.

       -h     Put all harddrives on the system in standby mode just before halt or poweroff.

       -p     When halting the system, do a poweroff. This is the default when halt is called as poweroff.

DIAGNOSTICS

       If you're not the superuser, you will get the message `must be superuser'.

NOTES

       Under older sysvinit releases , reboot and halt should never be called directly. From release 2.74 on halt and reboot invoke shutdown(8) if
       the system is not in runlevel 0 or 6. This means that if  halt  or  reboot  cannot  find  out  the  current  runlevel  (for  example,  when
       /var/run/utmp hasn't been initialized correctly) shutdown will be called, which might not be what you want.  Use the -f flag if you want to
       do a hard halt or reboot.

       The -h flag puts all harddisks in standby mode just before halt or poweroff. Right now this is only implemented	for  IDE  drives.  A  side
       effect  of  putting  the  drive in standby mode is that the write cache on the disk is flushed. This is important for IDE drives, since the
       kernel doesn't flush the write-cache itself before poweroff.

       The halt program uses /proc/ide/hd* to find all IDE disk devices, which means that /proc needs to be  mounted  when  halt  or  poweroff	is
       called or the -h switch will do nothing.

AUTHOR

       Miquel van Smoorenburg, miquels@cistron.nl

SEE ALSO

       shutdown(8), init(8)

								    Nov 6, 2001 							   HALT(8)

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