Topic: Setting up public/private keys for GIT via cygwin

Hello, I am learning Ruby on Rails so I apologize if my lingo is not right. Let me explain what I am trying to do.

I am following the ruby and rails free tutorial. I am setting up public private keys for GIT via cygwin. I am using this tutorial: … s_with_GIT

However I am guessing this is for using the GIT terminal. I am typing the following command in cygwin:
ssh-keygen -t dsa

It cant find that so I added on git in front so that it would recognize it as a GIT command, so I did:

  git  ssh-keygen -t dsa

It now says 'ssh-keygen' is not a command. Anything I am doing wrong?