Unable to stop nagios nrpe server

> Note: I am referring to an old Ubuntu 14.04 ! :( Don't blame me, it's not my fault. I have this process When I kill, something restart it automatically. I need to stop it! I tried what follows without succcess # systemctl disable nrpe.service # systemctl stop nrpe.service # systemctl status nrpe.service nrpe.service - Nagios Remote Plugin Executor Loaded: loaded (/etc/systemd/system/nrpe.service; disabled) Active: failed (Result: exit-code) since Tue 2021-08-17 09:44:23 CEST; 14min ago Docs: http://www.nagios.org/documentation Main PID: 21974 (code=exited, status=1/FAILURE) CGroup: name=dsystemd:/system/nrpe.service Aug 17 09:44:23 localhost nrpe: Starting up daemon Aug 17 09:44:23 localhost nrpe: Bind to port 5666 on 0.0.0.0 failed: Address already in use. I tried also # /etc/init.d/nagios-nrpe-server stop # /etc/init.d/nagios-nrpe-server status # But in htop the process is still running I queried status of service using old way # service --status-all [ - ] nagios-nrpe-server # service nagios-nrpe-server stop But the process is still here (with a different PID, so it's auto restarted) Also # systemctl stop nagios-nrpe-server Failed to issue method call: Unit nagios-nrpe-server.service not loaded. # systemctl disable nagios-nrpe-server Failed to issue method call: No such file or directory