Ever typed something in vi or vim and minutes later, realized you don’t have permission to save what you typed?
I was looking up how to goto a line in VIM, and found a great article that had the method of going to a line (:1322 if you wanted to go to link 1322), and I found a gem:
How to sudo vim AFTER you’ve already typed
http://vim.wikia.com/wiki/Su-write says:
:w !sudo tee % > /dev/null