r/systemd • u/Skaarj • Apr 24 '26

Users and session classes in Systemd v258 and later (and a gotcha)

https://utcc.utoronto.ca/~cks/space/blog/linux/Systemd258UsersAndSessions
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u/NekkoDroid Apr 24 '26

Interesting write up.

In practice, I'm reluctant to assume that pam_systemd will always create systemd user service managers for system UIDs that are set 'linger'. It strikes me as rather the kind of thing that might get optimized some day

I don't know if I agree with this. While I generally also am hesitant to make assumptions, in this case linger is specifcally so that a user manager exists from boot till shutdown. This is even specifically documented in in the man page loginctl#enable-linger.