Manage RVM

// To install
gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
curl -sSL https://get.rvm.io | bash -s master
source /usr/local/rvm/scripts/rvm

# Install a Ruby version
# Replace Version with the version, that should be installed!
# To see all exists versions, run `rvm list known`
rvm install ruby-VERSION

// To uninstall
rm -r /usr/local/rvm