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.../halt [ -oqy ] DESCRIPTION halt writes out any information pending to the disks and then stops the processor. halt normally logs the system shutdown to the system log daemon, syslogd(8), and places a shutdown record in the login accounting file Ivar/admlwtmp. These actions are inhibited if the -0 or -q options are present. The BSD 4.3 (that ran on VAXen) man pages say largely similar things: https://www.freebsd.org/cgi/man.cgi?query=halt&apropos=0&sektion=0&manpath=4.3BSD+Reno&arch=default&format=html Everything is so...

...IPTION > halt writes out any information pending to the disks and then > stops the processor. > halt normally logs the system shutdown to the system log > daemon, syslogd(8), and places a shutdown record in the > login accounting file Ivar/admlwtmp. > These actions are inhibited if the -0 or -q options are present. > > The BSD 4.3 (that ran on VAXen) man pages say largely similar things: > > > https://www.freebsd.org/cgi/man.cgi?query=halt&apropos=0&sektion=0&manpath=4.3BSD+Reno&arch=default&for...

...halt writes out any information pending to the disks and then >> stops the processor. >> halt normally logs the system shutdown to the system log >> daemon, syslogd(8), and places a shutdown record in the >> login accounting file Ivar/admlwtmp. >> These actions are inhibited if the -0 or -q options are >present. >> >> The BSD 4.3 (that ran on VAXen) man pages say largely similar things: >> >> >> >https://www.freebsd.org/cgi/man.cgi?query=halt&apropos=0&sektion=0&manpath=4.3B...

> fwiw, i've always used 'init 0' to shut down all sorts of unix/linux > systems. In EL7/EL8, init is now a symlink as well because everything is controlled by systemd. > On old school unix, and I think even early Linux, halt was an > /immediate/ halt, as in catch fire. might as well hit the power switch. > Not quite. Shutdown is a timed thing so you can tell it