Is this the private key? What's the difference between fingerprint

File: Screen Shot 2017-03-11 at 8.46.33 PM.png (80KB, 1586x506px) Image search: [Google]

80KB, 1586x506px

Is this the private key? What's the difference between fingerprint and private key?

I had created an SSH key and then fully restarted my computer. I tried to take this SSH "fingerprint" (pic related but it was a different one that was in use) and add it to my ssh-agent on my computer like so:

eval "$(ssh-agent -s)"

ssh-add -K ~/.ssh/[here's where key went]

It's obviously I was doing something tremendously wrong, but I can't figure out what. If I am trying to add a github SSH key to my ssh-agent, how do I do it?