shutdown -p now

そっか・・・p オプション。知らなかった(汗

FreeBSDでシステムを停止し、電源をオフする場合

shutdown -p now

SHUTDOWN(8)             FreeBSD System Manager’s Manual            SHUTDOWN(8)

NAME

shutdown — close down the system at a given time

SYNOPSIS

shutdown [-] [-h | -p | -r | -k] [-o [-n]] time [warning-message …]

DESCRIPTION

The shutdown utility provides an automated shutdown procedure for super-

users to nicely notify users when the system is shutting down, saving

them from system administrators, hackers, and gurus, who would otherwise

not bother with such niceties.

The following options are available:

-h      The system is halted at the specified time.

-p      The system is halted and the power is turned off (hardware sup-port required) at the specified time.

-r      The system is rebooted at the specified time.