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47 lines
1.8 KiB
XML
47 lines
1.8 KiB
XML
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<chapter xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-user-sessions">
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<title>User Sessions</title>
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<para>
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Systemd keeps track of all users who are logged into the system
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(e.g. on a virtual console or remotely via SSH). The command
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<literal>loginctl</literal> allows querying and manipulating user
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sessions. For instance, to list all user sessions:
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</para>
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<programlisting>
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$ loginctl
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SESSION UID USER SEAT
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c1 500 eelco seat0
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c3 0 root seat0
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c4 500 alice
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</programlisting>
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<para>
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This shows that two users are logged in locally, while another is
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logged in remotely. (<quote>Seats</quote> are essentially the
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combinations of displays and input devices attached to the system;
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usually, there is only one seat.) To get information about a
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session:
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</para>
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<programlisting>
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$ loginctl session-status c3
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c3 - root (0)
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Since: Tue, 2013-01-08 01:17:56 CET; 4min 42s ago
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Leader: 2536 (login)
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Seat: seat0; vc3
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TTY: /dev/tty3
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Service: login; type tty; class user
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State: online
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CGroup: name=systemd:/user/root/c3
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├─ 2536 /nix/store/10mn4xip9n7y9bxqwnsx7xwx2v2g34xn-shadow-4.1.5.1/bin/login --
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├─10339 -bash
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└─10355 w3m nixos.org
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</programlisting>
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<para>
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This shows that the user is logged in on virtual console 3. It also
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lists the processes belonging to this session. Since systemd keeps
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track of this, you can terminate a session in a way that ensures
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that all the session’s processes are gone:
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</para>
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<programlisting>
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# loginctl terminate-session c3
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</programlisting>
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</chapter>
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