Remove authorized keys
rm -f /root/.ssh/authorized_keysGenerate new RSA key
ssh-keygen -t rsa -b 4096Remove existing host keys
rm -rfv /etc/ssh/*key*Automatically regenerate host keys
/usr/bin/ssh-keygen -A
rm -f /root/.ssh/authorized_keysssh-keygen -t rsa -b 4096rm -rfv /etc/ssh/*key*/usr/bin/ssh-keygen -A