Don’t forget to create your SSH key first.
root@odroidu2-1:~# ssh-copy-id email@example.com firstname.lastname@example.org's password: (enter password) Now try logging into the machine, with "ssh 'email@example.com'", and check in: ~/.ssh/authorized_keys to make sure we haven't added extra keys that you weren't expecting. root@odroidu2-1:~# ssh firstname.lastname@example.org ... pi@rpi-torrent ~ $
Use ssh-copy-id when SSH port is not 22. (Custom port.)