halt - Stops the processor
/usr/sbin/halt [-d] [-l] [-n] [-q] [-y]
-d Generates a crash dump of the system before halting it. Can be used
with any other option.
-l Does not log the halt using syslog.
-n Prevents the sync before stopping, and does not log the halt using sys-
-q Causes a quick halt, does not log the halt using syslog, and makes no
attempt to kill all processes.
-y Halts the system from a dial-up operation.
If other users are logged into the system, or if the system is operating at
a multiuser run level, use the /usr/sbin/shutdown -h command to halt the
system. If only the root user is logged in, and you do not plan to restart
the system immediately, use the halt command.
The halt command writes data to the disks and then stops the processor(s),
but does not reboot the machine.
You must be the root user to run this command.
When the system displays the ...Halt completed... message, you can turn off
power to the machine.
If the command is invoked without the -l, -n, or -q option, the halt pro-
gram logs the shutdown using the syslogd command and places a record of the
shutdown in the login accounting file, /var/adm/wtmp. Using the -q and the
-n options imply the -l option.
1. To halt the system without logging the shutdown in the log file,
2. To halt the system quickly, enter:
3. To halt the system quickly, also leaving a crash dump for the savecore
halt -d -q
4. To halt the system from a dial-up, enter:
Specifies the command path.
Specifies the syslog daemon.
Specifies the login accounting file.
Commands: fasthalt(8), reboot(8), savecore(8), shutdown(8), syslogd(8)
Functions: reboot(2), sync(2), syslog(3)