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ZZZ(8) System Manager's Manual ZZZ(8) NAME zzz -- suspend the system SYNOPSIS zzz DESCRIPTION The zzz utility suspends the system by writing a suspend transition re- quest to /dev/power. The specific sleep method used (e.g. suspend-to-idle or firmware suspend) is determined by the kern.power.suspend sysctl. SEE ALSO acpi(4), acpiconf(8) HISTORY The zzz utility first appeared as a shell script in FreeBSD 5.1. It suspended the system by invoking acpiconf(8) with the suspend state configured via hw.acpi.suspend_state, or apm(8) on systems without ACPI support. It was rewritten in C in FreeBSD 16.0 to use the generic power manage- ment interface provided by /dev/power. AUTHORS The original zzz script was written by Mark Santcroos <marks@ripe.net>. This manual page was originally written by Nate Lawson <njl@FreeBSD.org>. Both the current program and manual page were written by Aymeric Wibo <obiwac@FreeBSD.org>, under sponsorship from the FreeBSD Foundation. FreeBSD 16.0 CURRENT May 26, 2026 ZZZ(8)
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS
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