$ssh -vT git@github.com...Agent admitted failure to sign using the key.debug1: No more authentication methods to try.Permission denied (publickey).
Resolution
For most users, simply running ssh-add to load your keys into the SSH agent will fix this issue.$ssh-add# Enter passphrase for /home/you/.ssh/id_rsa: [tippy tap]# Identity added: /home/you/.ssh/id_rsa (/home/you/.ssh/id_rsa)If your key does not have the default filename, you'll have to pass the path to ssh-add.
$ ssh-add ~/.ssh/my_other_key# Enter passphrase for /home/you/.ssh/my_other_key: [tappity tap tap]# Identity added: /home/you/.ssh/my_other_key (/home/you/.ssh/my_other_key)