Do not blame admins (or in general users, too) of using nano (pico) it is away too simple for simple tasks, which are probably the most cases under console.

• • Save a file – press Esc key, then press and hold SHIFT and then press colons “:”, the bottom line of your screen will change and will start with colons “:”, then type the key “w” and then hit Enter key, so you’ve just saved the opened file.
    • 1. press Esc
      2. press and hold SHIFT
      3. press the key with colons “:“
      4. type “w“
      5. hit Enter key
  • Save a file and quit – press Esc key, then press and hold SHIFT and then press colons “:”, the bottom line of your screen will change and will start with colons “:”, then type the key “x” and then hit Enter key, so you’ve just saved the opened file.
    • 1. press Esc
      2. press and hold SHIFT
      3. press the key with colons “:“
      4. type “x“
      5. hit Enter key
  • Save all opened files – press Esc key, then press and hold SHIFT and then press colons “:”, the bottom line of your screen will change and will start with colons “:”, then type the key “wa” and then hit Enter key, so you’ve just saved the opened file.
    • 1. press Esc
      2. press and hold SHIFT
      3. press the key with colons “:“
      4. type “wa“
      5. hit Enter key
  • Quit without saving, just quit the vim – press Esc key, then press and hold SHIFT and then press colons “:”, the bottom line of your screen will change and will start with colons “:”, then type the key “q!” and then hit Enter key
    • 1. press Esc
      2. press and hold SHIFT
      3. press the key with colons “:“
      4. type “q!“
      5. hit Enter key
• Enable auto save with two ESC keys – create or edit file
  

  ~/.vimrc

  Add the following line:

  map <Esc><Esc> :w<CR>
  

* The Esc can be avoided

The escape key can be replaced with pressing and holding CTRL and pressing “[” (left square bracket) = “CTRL+[” and if your “[” is hard typing, you can try CTRL plus “c” = “CTRL+c”, all this is needed to be sure you are not in vim’s insert mode. Avoiding Esc – escape button could be useful under not qwerty keyboards of the mobile devices – smartphones, tablets and so on.