Vim

vim (supported) is a powerful editor. It has a steep initial learning curve. Many people in damtp use one of emacs or vim. vi is the predeccsor of vim.

To start vim in gnome. Select Foot -> Run program -> select "Run in Terminal" and type in vim filename. To start vi follow the above instructions changing vim to vi.

vim has an tutorial called vimtutor. To start the tutorial go to the Run program dialog box again but this time type in vimtutor

You can use google to search for vim tutorials.

In the same way you could use google to search for vi tutorials.

More information at http://www.vim.org.