Once you're connected to one of UCC's servers you'll want to start running things. Unfortunately you only have a single terminal interface which can only run a single foreground process at a time. You could open up an SSH session for every program you want to run, or you could use a terminal multiplexing program like screen or tmux. Terminal multiplexers also allow you to keep processes running even once you terminate your SSH session.

Screen

Once you have connected to the server via SSH, run "screen". This will launch the program and give you a terminal window that won't disappear when you disconnect from ssh. If you disconnect from ssh and want to reattach the the screen session you were previously running, reopen ssh and type "screen -dR".

If your screen stops responding, try pressing "Ctrl + a then Ctrl + q" and "Ctrl + q". You may have accidentally frozen it yourself.

Tmux

After SSHing to the server, simply run "tmux" to begin. You will be placed into a new terminal window from which you can run commands as usual. Tmux's "prefix" key is <C-b> (i.e. "Ctrl + b"), which you can press followed by a command key to perform actions such as switching windows, detaching, adding a new window, etc. Similar to screen, detaching tmux allows you to keep processes running after terminating your SSH session. A few useful command keys include:

A full list of command keys can be found in the man page for tmux under the section "Default Key Bindings".