Survive in nano and vim

Open, edit, save and quit.

1. nano, the simplest:

   nano fichier.txt

   Copy
2. In nano: Ctrl + O saves, Ctrl + X quits, Ctrl + W searches.
3. vim, present everywhere:

   vim fichier.txt

   Copy
4. In vim: press i to type, Esc to go back to command mode.
5. Save and quit: type :wq then Enter. Quit without saving: :q! then Enter.
6. To choose the default editor: sudo update-alternatives --config editor (Debian/Ubuntu).