Homebrew install permissions issue

Question

I have a standard homebrew install inside of usr/local/

When I try:

Larson-2:~ larson$ brew install postgresql
Error: Cannot write to /usr/local/Cell         


        

Answer 1

You somehow have limited permissions to /usr/local/Cellar. Brew doesn't like to install with sudo which is why it refuses.

Check the permissions:

ls -ld /usr/local/Cellar

Open them up for writing:

sudo chmod a+w /usr/local/Cellar