The Pains of SSH Keys on a New Mac

ssh_keys_new_mac.md

GitHub's ssh keys are a bit of a pain on a new Mac. I've done this twice now. Making a gist so I don't forget again.

Step 1. Add GitHub as a known host

This will fail but it will add it to the ~/.ssh/known_hosts so you can see what type of key it is going to look for.

$ ssh -T git@github.com
$ cat ~/.ssh/known_hosts | grep github

Step 2. Create a new key based on the type GitHub is using

$ ssh-keygen -t ecdsa

Well on further inspection it seems like ecdsa is the common thread here and the other key types don't work.

Step 3. Manually add it to the list of keys

$ ssh-add ~/.ssh/id_ecdsa

Step 4. Try again

$ ssh -T git@github.com

Compare notes with GitHub docs