* '''[http://gnometerminator.blogspot.com/p/introduction.html Terminator]''' is a terminal, that is, a program that users interact with by typing in commands.
* '''[http://tmux.sourceforge.net/ tmux]''' is a terminal multiplexer that allows users to run multiple programs inside one, e.g., Terminator terminal running OpenSSH.
* '''[http://www.vim.org/ vim]''' is a text editor. A great deal of the server maintenance done to PhilBio.net is simply editing manipulating text files.