one of the most basic and powerful necessities required to work with linux, is the need to be able to edit a text file in a terminal.

intro:  On all Unix systems there is a very powerful text editor called “vi”.  It’s pretty difficult to learn, but well worth the rewards being that any Unix web server will have it installed by default.  I also like an editor called "joe". I'm pretty new with "joe" but it seems to be easier than "vi", pretty powerful, and available for most any unix system. But you'll still need to install joe, as it will not be on by default. However, there’s a much easier text editor usually found on all Redhat installations.  It’s called “pico”.  Pico can be called up in a terminal window on the server or from a Secure Shell window.  For editing a broken hyperlink, especially if you are away from the office this is much faster than downloading the file editing and uploading. Pico is also similar to notepad or simpletext as far as functionality and ease of use. But keep in mind that you will probably want to learn a more powerful editor if you are going to be editing files on your linux box more than just occasionally.

Learn more about "vi", "joe" or "pico"