5. Configuring the OpenSSH server

To enable the OpenSSH server (sshd) to retrieve users' public keys for authentication, you will need to modify the OpenSSH server configuration file (sshd_config). To do this, use your favorite text editor and add the following lines to the bottom of the /etc/ssh/sshd_config file.

AuthorizedKeysCommand /opt/k9/bin/k9-ssh --user=%u

AuthorizedKeysCommandUser key9

Once you have completed editing the file, restart the OpenSSH service:

systemctl restart ssh