sshd service could not be started - CloudCommandos/JohnChan GitHub Wiki
Run the following command to test sshd and see what the problem is
sshd -t
If the problem is unable to load the keys in /etc/ssh/, regenerate the keys
ssh-keygen -A
Restart sshd.service
systemctl restart sshd.service
Check sshd.service
systemctl status sshd.service