Install ruby via rbenv on Ubuntu.md

Notes

Tested on Ubuntu 22.04 LTS (WSL), should work on other versions. Uninstall all pre-installed ruby installs first.

0. Update apt repos first, always

$ sudo apt update

1. Install needed tools

$ sudo apt install curl libssl-dev zlib1g-dev git gcc g++ default-jre -y

2. Install rbenv

$ curl -fsSL https://github.com/rbenv/rbenv-installer/raw/HEAD/bin/rbenv-installer | bash

3. Init rbenv on startups

$ echo 'eval "$(~/.rbenv/bin/rbenv init - bash)"' >> ~/.bashrc

4. Restart your terminal

$ rbenv install -l

6. Install ruby and jruby

$ # Select the latest stable version of ruby and jruby. Then run:
$ rbenv install 'ruby version' --verbose
$ rbenv install 'jruby version' --verbose

7. Set the default ruby version

$ rbenv global 'ruby version'