More times than I want to admit I will open a config as a non-super user and will go about making the changes I need. As soon as I save in nano, or vi I am met with permissions errors.
At this point I c/p foo my way around so I can close and reopen with sudo.
Is there a way to escalate to a super user in order to save without closing and reopening in vi or nano?
I don't know about nano, but I do know that you can write a file you don't have permission to access in vim. Try running this command:
:w !sudo tee %
This will save the file even if you don't have permission to it. Nathan Long has a great explanation of how this works here, but I'll give a short explanation too.
:w doesn't mean save, it means write. So in this case, :w !foo means write into the external command foo. In this case, the external command is sudo tee %, where % is the name of the current file. Tee will write to a given file and STDOUT simultaneously, and since we run it with sudo, it has the necessary permissions to write the file.
