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OpenSUSE sshd Setup For pubkey

WARNING: This can lock you out if anything goes wrong

Key generation [local]

  1. Use ssh-keygen to create key pair

    ssh-keygen -t ed25519 -C "name@example.com"

  2. Using xclip to copy public key from local machine

    xclip -selection clipboard < ~/.ssh/id_ed25519.pub

Add key to authorized_keys [remote]

  1. Create file authorized_keys at root home dir /root

    touch authorized_keys

  2. Change permissions to 644

    chmod 644 authorized_keys

  3. Add ssh pubkey to authorized_keys using nano or vim

Configure sshd [remote]

  1. File sshd_config is located in /etc/ssh

  2. Set following options

    PubkeyAuthentication yes 
AuthorizedKeysFile .ssh/authorized_keys
PasswordAuthentication no
ChallengeResponseAuthentication no
UsePAM yes

  3. Restard sshd

    systemctl restart sshd