1. Login EMA Server\n2. Go to /home/ingres/ema/ema/nagios/etc/ssh\n3. Backup id_rsa and id_rsa.pub\n4. Generate new ssh-key using command\n\tssh-keygen -t ed25519\n5. Save as /home/ingres/ema/ema/nagios/etc/ssh/id_rsa\n6. Login to target server -- legacypdcsvr\n7. Go to /home/ingres/.ssh\n8. Remove entry from file authorized_keys\n9. Login EMA Server\n10. Go to /home/ingres/ema/ema/nagios/etc/ssh and run\n\tdocker exec -it ema ssh-copy-id -i /usr/local/nagios/etc/ssh/id_rsa ingres@172.16.226.231\n\tssh ingres@172.16.226.231\n\tdocker exec ema /etc/init.d/nagios restart\n\n11. Check on Nagios browser\n\nNOTE: ssh-keygen -t ed25519 applicable only for RHEL7,8,9