Example shows two running sessions: 0 and my_named_session:
tmux ls 0: 1 windows (created Sat Sep 15 09:38:43 2018) [158x35] my_named_session: 1 windows (created Sat Sep 15 10:13:11 2018) [78x35]
tmux
[ ls | a | new ]
.tmux.conf, tlog, cockpit
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