Tmux

sharing between different account involves using a "socket" -- a special file that can be configured to be sharable.

 tmux -S /tmp/shared new -s shared
 chgrp users /tmp/shared

Where shared is the name of the session, and users the name of a group that everybody is already a part of. See chgrp.

Sources

• https://www.howtoforge.com/sharing-terminal-sessions-with-tmux-and-screen#sharing-between-two-different-accounts-with-tmux