How to find package for installed file in Brew?

Question

How can I identify the package/formula for a given file, or a listing of all of a package\'s owned files, in Homebrew?

Answer 1

To see all files in a package:

brew ls 

To find the package for a file, look at the file like this:

ls -l /usr/local/bin/whatever

If it was installed by Homebrew, it will be a symlink into /usr/local/Cellar/something, so that will tell you what package it's from.