How to share a tmux session accross users

It can be handy to share a tmux session between different user accounts, for example to allow a someone to look over your shoulder while you work on something.

To do this, we need to have a folder with group permission shared between the two persons.

In the Fedora infrastructure we can easily use the fi-apprentice group for this.

So we have created the folder /var/tmux/, which is writable for both the fi-apprentice and sysadmin groups

You can then create a tmux session using:

(The socket and session names can be different, but they don’t have to)

And the other person(s) can join it using:

Once the person who created the shared session stops it, the people who have joined will be kicked out of the session as well.