ubuntu 18.04 install RVM & Ruby

Pre-requisites

You need software-properties-common installed in order to add PPA repositories.

If not installed, open a terminal (Ctrl+Alt+T) and run:

sudo apt-get install software-properties-common

 1. Add the PPA and install the package

Open a terminal (Ctrl+Alt+T) and run:

sudo apt-add-repository -y ppa:rael-gc/rvm
sudo apt-get update
sudo apt-get install rvm

 2. Change your terminal window

Now, in order to always load rvm, change the Gnome Terminal to always perform a login.

At terminal window, click Edit > Profile Preferences, click on Title and Command tab and check Run command as login shell.

 3. Reboot

A lot of changes were made (scripts that needs to be reloaded, you're now member of rvm group) and in order to properly get all them working, you need to reboot (in most cases a logout/login is enough, but in some Ubuntu derivatives or some terminal emulators, a shell login is not performed, so we advice to reboot).

 4. Install a ruby

Now you're ready to install rubies. Open a terminal (Ctrl+Alt+T) and run:

rvm install ruby