Question

How do you save sudo nano, etc. hosts?

Answer 1

I do not remember with nano, but with vi, from my Unix/linux years:

vi /etc/hosts or sudo vi/etc/hosts

you have to write :w! to write or :wq!

Press Esc to enter Command mode, and then type :wq to write and quit the file. The other, quicker option is to use the keyboard shortcut ZZ to write and quit. To the non-vi initiated, write means save, and quit means exit vi.

source An introduction to the vi editor.

with ! you modify the file

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