Vim Tricks: sudo write current file

You've opened a file in vim, made a bunch of changes then when you go to save you realize that you needed to open with sudo.

:w
212: Can't open file for writing

Rather than closing vim and doing all the changes again you can execute a sudo write from within vim

:w !sudo tee % > /dev/null

I've saved this command in my .vimrc so I can do this with :W

command W w !sudo tee % > /dev/null