Nagios NRPE client install on ubuntu 22.04

 Install NRPE agent from default ubuntu Repos.
 
apt install nagios-nrpe-server
 
Configuration changes:
 
nano /etc/nagios/nrpe.cfg

 
 
command[check_disk]=/usr/lib/nagios/plugins/check_disk  -w 60 -c 50 -u GB -p /
 
allowed_hosts=127.0.0.1,$nagios_server_ip
 
 
Restart service:

/etc/init.d/xinetd restart
/etc/init.d/nagios-nrpe-server restart

 
 
Nagios server configurations:
 
nano /nagios/server/directory/server.cfg
 

define host{
use                             linux-server
host_name                       hostname
alias                           hostname
address                         IP
max_check_attempts              2
check_period                    24x7
notification_interval           30
notification_period             24x7
}
define service{
        use                     generic-service
        host_name               hostname
        service_description     Disk Usage
        check_command           check_nrpe!check_disk!-a '-w 60 -c 50 -u GB -p /'
}