sudo yum-config-manager --add-repo http://fishshell.com/files/linux/RedHat_RHEL-6/fish.release:2.repo
sudo yum install fish
brew install fish
curl -L https://github.com/bpinto/oh-my-fish/raw/master/tools/install.fish | fish
chsh -s /usr/local/bin/fish
sudo chsh -s /usr/local/bin/fish
Terminal > Window Settings > check "Use option key as meta key."