Pico is a simple text editor (similar to the email tool pine). You fire it up by just typing its name possibly followed by the name of the file you wish to edit. A screen appears into which you can type text at the bottom of which are a set of self-explanatory commands. For example, to write out the file (save it) just type ctrl-O and it will prompt you for a file name. Similarly ctrl-R reads a file in. You can move about using the arrow keys, move to a new line by pressing return, delete characters with the delete key etc etc.