vi - getting an error E212: Can't open file for writing

Question

I am following this tutorial for setting opendiff for git: http://thomashunter.name/blog/set-opendiff-filemerge-as-your-git-diff-tool-on-os-x/

I open vi like it said in tutorial, write some lines and try :wq but get error - error E212: Can't open file for writing

I browsed stack overflow for a little bit, and tried typing

sudo vim ~/bin/git-diff.sh

But I am also getting the same error.

I haven't had much experience with unix based systems, so what am i to do?

Answer 1

You don't have a bin directory below ~ (which is /Users/username). The error message of "~/bin/git-diff.sh" [New DIRECTORY] at the bottom of the vim screen should have been a hint