rew install gnupg gpg --keyserver hkp://pgp.mit.edu --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB \curl -sSL https://get.rvm.io |bash -s stable --ruby
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*
rvm list
rvm list known
rvm install <version>
rvm use ruby-2.5.1 --default
原文:https://www.cnblogs.com/meitian/p/12860123.html