How to get Ruby / Homebrew / RVM to work on Yosemite?

Question

After installing Yosemite, I was unable to run brew or ruby.

I was getting this error on brew update:

/usr/local/bin/brew: /usr/local/Library/brew.r         


        

Answer 1

brew update error can be fixed with this:

sudo chown -R $USER:admin /usr/local
cd /usr/local
git reset --hard origin/master
brew update

https://github.com/Homebrew/homebrew/issues/19140