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Diffstat (limited to 'nixos/doc/manual/administration/user-sessions.chapter.md')
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diff --git a/nixos/doc/manual/administration/user-sessions.chapter.md b/nixos/doc/manual/administration/user-sessions.chapter.md new file mode 100644 index 00000000000..5ff468b3012 --- /dev/null +++ b/nixos/doc/manual/administration/user-sessions.chapter.md @@ -0,0 +1,43 @@ +# User Sessions {#sec-user-sessions} + +Systemd keeps track of all users who are logged into the system (e.g. on +a virtual console or remotely via SSH). The command `loginctl` allows +querying and manipulating user sessions. For instance, to list all user +sessions: + +```ShellSession +$ loginctl + SESSION UID USER SEAT + c1 500 eelco seat0 + c3 0 root seat0 + c4 500 alice +``` + +This shows that two users are logged in locally, while another is logged +in remotely. ("Seats" are essentially the combinations of displays and +input devices attached to the system; usually, there is only one seat.) +To get information about a session: + +```ShellSession +$ loginctl session-status c3 +c3 - root (0) + Since: Tue, 2013-01-08 01:17:56 CET; 4min 42s ago + Leader: 2536 (login) + Seat: seat0; vc3 + TTY: /dev/tty3 + Service: login; type tty; class user + State: online + CGroup: name=systemd:/user/root/c3 + ├─ 2536 /nix/store/10mn4xip9n7y9bxqwnsx7xwx2v2g34xn-shadow-4.1.5.1/bin/login -- + ├─10339 -bash + └─10355 w3m nixos.org +``` + +This shows that the user is logged in on virtual console 3. It also +lists the processes belonging to this session. Since systemd keeps track +of this, you can terminate a session in a way that ensures that all the +session's processes are gone: + +```ShellSession +# loginctl terminate-session c3 +``` |