Nagios Setup ############# Pre-requisites Setup: Apache ------ # sudo yum install httpd # sudo systemctl start httpd.service # sudo systemctl status httpd.service # sudo systemctl enable httpd.service Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service. Take your servers public ip in the browser, and it will show the apache default page: PHP ---- # sudo yum install php php-mysql # sudo systemctl restart httpd.service Now create a file in /var/www/html/info.php vi info.php phpinfo(); ?> http://ip/info.php This will load the php configuration details Nagios ------ Install Build Dependencies in nagios server # sudo yum install gcc glibc glibc-common gd gd-devel make net-snmp openssl-devel xinetd unzip Create Nagios User and Group in nagios server --------------------------------------------- # sudo useradd nagios # sudo groupadd nagcmd # sudo usermod -a -G nagcmd nagios