halt(1M) System Administration Commands halt(1M)NAME
halt, poweroff - stop the processor
SYNOPSIS
/usr/sbin/halt [-dlnqy]
/usr/sbin/poweroff [-dlnqy]
DESCRIPTION
The halt and poweroff utilities write any pending information to the
disks and then stop the processor. The poweroff utility has the machine
remove power, if possible.
The halt and poweroff utilities normally log the system shutdown to the
system log daemon, syslogd(1M), and place a shutdown record in the
login accounting file /var/adm/wtmpx. These actions are inhibited if
the -n or -q options are present.
OPTIONS
The following options are supported:
-d Force a system crash dump before rebooting. See dumpadm(1M) for
information on configuring system crash dumps.
-l Suppress sending a message to the system log daemon, syslogd(1M),
about who executed halt.
-n Prevent the sync(1M) before stopping.
-q Quick halt. No graceful shutdown is attempted.
-y Halt the system, even from a dialup terminal.
FILES
/var/adm/wtmpx History of user access and administration informa‐
tion.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWcsu │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOdumpadm(1M), init(1M), reboot(1M), shutdown(1M), sync(1M), syslogd(1M),
inittab(4), attributes(5), smf(5)NOTES
The halt and poweroff utilities do not cleanly shutdown smf(5) ser‐
vices. Execute the scripts in /etc/rcnum.d or execute shutdown actions
in inittab(4). To ensure a complete shutdown of system services, use
shutdown(1M) or init(1M) to reboot a Solaris system.
The -y option is subject to removal in a future Oracle Solaris release.
SunOS 5.10 15 Mar 2012 halt(1M)