Getting root permissions on a file inside of vi?

Question

Often while editing config files, I'll open one with vi and then when I go to save it realize that I didn't type sudo vi filename Is there any way to give vi sudo privileges to save the file? I seem to recall seeing something about this while looking up some stuff about vi a while ago, but now I can't find it.

Answer 1

when writing, do this:

:w !sudo tee %

that will write the contents of the current file to the current file with sudo permissions.