utmp_register(8) on Linux
The text f739d5eed96b, as Debian 12 (Bookworm) shipped it. The page shows this text now.
make entries in the utmp/wtmp database
Flags it lists
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-A -
-D -
-U -
-W -
-e -
-h -
-l -
-p -
-s -
-t -
-u -
-w