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man pages section 8: System Administration Commands

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Updated: Thursday, June 13, 2019
 
 

halt(8)

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(8), 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(8) for information on configuring system crash dumps.

–l

Suppress sending a message to the system log daemon, syslogd(8), about who executed halt.

–n

Prevent the sync(8) before stopping.

–q

Quick halt. No graceful shutdown is attempted.

Files

/var/adm/wtmpx

History of user access and administration information.

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
system/core-os

See Also

inittab(5), attributes(7), smf(7), reboot(8), dumpadm(8), init(8), shutdown(8), sync(8), syslogd(8)

Notes

The halt and poweroff utilities do not cleanly shutdown smf(7) services, execute the scripts in /etc/rcnum.d, or execute shutdown actions in inittab(5). To ensure a complete shutdown of system services, use shutdown(8) or init(8) to reboot a Solaris system.