tmux is a terminal multiplexer. It allows you to create and control multiple terminals from a single screen.
To see what versions of tmux are available type
module avail tmux
To see what other modules are needed, what commands are available and how to get additional help type
module help tmux
To use tmux, include a command like this in your batch script or interactive session to load the tmux module:
module load tmux
Be sure you also load any other modules needed, as listed by the
module help tmux command.