Show every session, window, pane, etc...
help
// what it does
Runs tmux's built-in info command, which dumps the full internal state of the running server: every session, window, and pane, each attached client, and the options set on them. Reach for it when you're debugging a layout or a script and need to see exactly what tmux thinks is running.
// shell
$ tmux info// gotcha
tmux info only reports on an already-running server. If no session exists, tmux spins up a throwaway server with nothing in it — start or attach to a session first, or the output will look empty.