documentation issue

[ChristophHoyer]

Hej there - I just tried to follow the installation instructions of platform-samples/api/ruby/find-inactive-members/ and the command
gem install octokit
does not work. I tried it with the regular admin, as well as with elevated rights (sudo). The error message is the same:
-bash: gem: command not found

[nimdanor]

https://stackoverflow.com/questions/5736568/can-i-install-gems-with-apt-get-on-ubuntu