ssh-keygen -C "key-identifier" (without quotes)
scp ~/.ssh/id_rsa.pub server.example.org
cat ~/id_rsa.pub >> ~/.ssh/authorized_keys
Create or open the file at ~/.ssh/config Add the following lines:
Host server.example.org
User git
Hostname server.example.org
PreferredAuthentications publickey
IdentityFile [local path to private key half of the public key you provided]
The main ssh config file is at /etc/ssh/ssh_config.