I have installed Komodo Edit 10, a really nice editor for HTML, CSS, PHP, and a variety of computer language source files on Ubuntu, Debian, and Mint.

     This is a really nice way to edit your website online here.  It is a graphical application so you should use x2go to access the machines in question.

     Under the Mate Desktop, Komodo Edit 10 can be found under Applications → Programming → Komodo Edit.