How do I upgrade to Ruby 2.2 on my Ubuntu system?
Why not use ruby 2.3 which is available in the repositories for 16.04 and 17.10 with
sudo apt update
After the update is finished run:
sudo apt-get install ruby2.3 ruby2.3-dev
Or try ruby 2.4 or 2.5
You can get those via the brightbox PPA
Add the repository and update
sudo apt-add-repository ppa:brightbox/ruby-ng && sudo apt-get update
install
sudo apt-get install ruby2.4
or for 18.04
sudo apt-get install ruby2.5 ruby2.5-dev
Information on the status of packages in the aforementioned PPA can be found on the “Brightbox” team launchpad page.
Alternatively you could try reverse hacking the error alternative path /usr/bin/ruby2.2 doesn't exist
by creating it with sudo mkdir /usr/bin/ruby2.2
and trying again.