difficulties in upgrading the Nagios Core

[Nagios_kelvin]

We are upgrading our Nagios Core from 4.3.2 to 4.4.6 following https://assets.nagios.com/downloads/nag ... l#pack2src.

Every step is fine until this one step "Important: If you are upgrading from version 4.3.3 or before, to version 4.3.4 or after, there are changes that need to made to the initialization script, and to your main Nagios configuration file."

[root@sysmon nagios-4.4.6]# make install-init
/bin/install -c -m 755 -d -o root -g root /lib/systemd/system
/bin/install -c -m 755 -o root -g root startup/default-service /lib/systemd/system/nagios.service
[root@sysmon nagios-4.4.6]# INITFILE=$(grep ^INIT_DIR= Makefile | sed 's/.*=//' | sed 's/.*/&\/nagios/') && grep ^NagiosRunFile $INITFILE
grep: /lib/systemd/system/nagios: No such file or directory

Could anyone advise where my initialization script lives? And how to find out the value of my new lock file since the recommended command does not work?