rvm install new ruby version
$ ruby -v # Check ruby version
$ rvm install ruby-X.X.X # Install specific ruby version
$ rvm list # List ruby versions
$ rvm use ruby-X.X.X # Choose a version to use
$ rvm use ruby-X.X.X --default # Set a version as default\curl -sSL https://get.rvm.io | bash
Also in C++:
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