sudo apt-add-repository ppa:brightbox/ruby-ng
Next generation Ubuntu packages for Ruby 2.6, 2.5, 2.4, 2.3, 2.2, 2.1, 2.0 1.9.3 and 1.8.
See https://www.brightbox.com/docs/ruby/ubuntu/ for more details.
Discussion list here:
https://groups.google.com/forum/#!forum/brightbox-ruby-ubuntu-packaging
https://www.brightbox.com
More info: https://launchpad.net/~brightbox/+archive/ubuntu/ruby-ng
Press [ENTER] to continue or Ctrl-c to cancel adding it.
Hit:1 http://fr.archive.ubuntu.com/ubuntu eoan InRelease
Hit:2 http://fr.archive.ubuntu.com/ubuntu eoan-updates InRelease
Ign:3 http://ppa.launchpad.net/brightbox/ruby-ng/ubuntu eoan InRelease
Hit:4 http://fr.archive.ubuntu.com/ubuntu eoan-backports InRelease
Err:5 http://ppa.launchpad.net/brightbox/ruby-ng/ubuntu eoan Release
404 Not Found [IP: 2001:67c:1560:8008::15 80]
...
...
E: The repository 'http://ppa.launchpad.net/brightbox/ruby-ng/ubuntu eoan Release' does not have a Release file.
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 19.10
Release: 19.10
Codename: eoan