A logo that I made for Linux and Ruby lovers:
Recursive Version
https://svgshare.com/i/P88.svg
Alternatively:
Simple Version
https://svgshare.com/i/P9B.svg
Alternatively:
Feel free to do whatever you like 
Downloading
require 'net/https'
%w(P88 P9B).map { |x| IO.write x, Net::HTTP.get(URI("https://svgshare.com/i/#{x}.svg")) }
Where to Use
You can use in your taskbar as menu icon:
Or as an icon to your rails project directory:
Ruby Logo Source
Linux Tux Source