How to change file permission from within vi

Question

I sometimes open a read-only file in vi, forgetting to do chmod +w before opening it. Is there way to change the file from within vi?

Something like !

Answer 1

After editing your file with vim, press "esc" and then ":". Then type the following command:

w !sudo tee %

Then press "Enter". Then type

:q!

to successfully exit from the editor.