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halt(8) System Manager's Manual halt(8) NAME halt - Stops the processor SYNOPSIS /usr/sbin/halt [-d] [-l] [-n] [-q] [-y] DESCRIPTION If other users are logged into the system, or if the system is operat- ing 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 proces- sor(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 flag, 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 flags imply the -l flag. FLAGS Generates a crash dump of the system before halting it. Can be used with any other flag. Does not log the halt using syslog Prevents the sync before stopping, and does not log the halt using syslog Causes a quick halt, does not log the halt using syslog, and makes no attempt to kill all processes Halts the system from a dial-up operation EXAMPLES To halt the system without logging the shutdown in the log file, enter: halt -l To halt the system quickly, enter: halt -q To halt the system quickly, also leaving a crash dump for the savecore command, enter: halt -d -q To halt the system from a dial-up, enter: halt -y FILES Specifies the command path Specifies the syslog daemon Specifies the login accounting file RELATED INFORMATION Commands: fasthalt(8), reboot(8), savecore(8), shutdown(8), syslogd(8) Functions: reboot(2), sync(2), syslog(3) delim off halt(8)