解决Permission denied - /usr/local/var/homebrew

http://stackoverflow.com/questions/16432071/how-to-fix-homebrew-permissions

stackoverflow上的答案
I was able to solve the problem by using chown
on the folder:
sudo chown -R "$USER":admin /usr/local
Also you'll (most probably) have to do the same on /Library/Caches/Homebrew
:
sudo chown -R "$USER":admin /Library/Caches/Homebrew