Systemd documents "halt" as the primary shutdown mechanism, redirecting "reboot" and "shutdown" to the halt(8), but halt is a really strange and obsolete concept. Who would want to really keep their machine running after shutdown? I expect that halting is almost unused. Let's at least make it less prominent in the docs. While at it, use "power off" for a verb and "power-off" for noun (but "poweroff" of the actual command name).
System and Service Manager
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