rubygems Getting started with rubygems Install specific precompiled ruby version and ruby gems (Ubuntu)

Example

sudo apt-add-repository ppa:brightbox/ruby-ng

Hit Enter to confirm

sudo apt-get update

Then you can install your ruby version of choice (the ppa supports ruby2.0 ruby2.1 ruby2.2 ruby2.3 and legacy versions ruby1.8 ruby1.9.1) Don't forget to include the respective -dev package for your version. Otherwise the development of native extensions such as Nokogiri or mysql2 will fail.

sudo apt-get install ruby2.3 ruby2.3-dev ruby-switch

sudo ruby-switch set ruby2.3

ruby -v

>> ruby 2.3.1p112 (2016-04-26) [x86_64-linux-gnu]

Now you can install any desired gem systemwide for all users via sudo gem install gemname.

Note:

• This method installs and sets ruby and rubygems system-wide for all users
• Requires sudo to install gems (sudo gem install rails) but don't run bundle as root. If it needs to install gems it will ask for the sudo password.