The second way to install a plugin is from a known gem source. A known gem source is a remote repository that the bundler system will attempt to locate and install a gem from. The most popular gem source is RubyGems, which is a ruby gem-hosting service.

Let's install a new plugin via this method. Here is an example command to run:

vagrant plugin install vagrant-hostsupdater

You will learn more about installing plugins and managing plugins in the coming sections.