How do I tell which users are connected to a shared tmux socket?

Question

I have created a shared socket for tmux to use.

tmux -S /tmp/pair

Then I have a 2nd user attach to the socket.

tmux -S /tmp/pair attach

How do I tell from the first session, the one that created the socket, tell that the 2nd user is connected?

I'm guessing it would be something from the lsof command.

Answer 1

You can use the list-clients command. By itself, it displays all clients connected to the server. If you specify a session with the -t option, it shows clients attached to the named session.

Answer 2

Like another user said in comments <prefix> D will list all the sessions but keep in mind that pressing enter will detach that client (which may or may not be what you want)