That command makes my eyes twitch. This sort of "download random stuff from internet, then pipe them to ruby/perl/python" madness should end, like right now. I'm assuming you're a reasonable person who knows what that commands does. Can you really not see how people can misuse commands like this to execute arbitrary code on people's computers, even experienced engineers if they carelessly copy-paste code like this. As a rule of thumb, to whoever reading this, please don't trust random strangers online and run their code. You never know. Always download code from trusted sources and check sha hashes. Piping anything else to ruby/perl/python is playing with fire.