Using a Linux text editor

Sooner or later, we will need to edit files from the shell command line. In many Debian systems, the default text editor is vi. If you're not comfortable with it, you probably could use a friendlier alternative. In Ubuntu systems, the default text editor is nano. You might prefer it since it's easier to use. In case it's not available in your server, it can be installed with:

$ sudo apt-get install nano

In the following sections, we will assume nano as the preferred editor. If you prefer any other editor, feel free to adapt the commands accordingly.