I couldn't find a solid set of instructions on how to do this so I decided to write it up quick. I did find a lot of tutorials for Ubuntu, but they seemed to encounter errors on elementary OS.

This is basically a lot of copy paste. I've gone through all the steps on elementary and it works like a charm.

cd

git clone https://github.com/rbenv/rbenv.git ~/.rbenv

git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build

  1. Open your .bashrc with nano nano .bashrc

  2. make sure you type or past the following lines into the bottom of your .bashrc

esac
# rbenv
export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"
  1. ctrl-o to save
  2. ctrl-x to quit

source .bashrc

rbenv install 2.7.1

rbenv gloabal 2.7.1

  1. Verify ruby -v

From here you should be able to install Rails or any other gems you wish.

Like I said, quick and dirty. I hope this helps people so they don't have to dig around as much for instruction.

--Cheers Tim

This post is also available on DEV.