Tmux is a screen multiplexer and at least version 1.6 is required. It is used here to allow multiple windows per session and multiple panes per window.
Each script is run in its own shell environment. It is not looped, but allowed to run once and then exit. This notifies tmux that the pane is dead and can then be respawned with another iteration of the script in a new shell environment.
This allows for scripts that crash to be restarted without user intervention.
NOTICE:
If "Save Tmux Settings" is the last thing you did on this page, refreshing will save the current form values again, not reload from database.