Nagios Core 4.4.9 AMI on Amazon Linux 2
This AMI features:
- Apache 2.4
- PHP 8.1
- Nagios Core 4.4.9
Nagios installation
Once the instance is running, please access your hosting domain or enter the public DNS provided by AWS {IPv4 Public IP} into your browser.
https://<Nagios host or IP>/nagios
Nagios web server requires basic authentication.

You can find the nagiosadmin
user password by accessing the System Log in the EC2 management console:
- Go to the Amazon EC2 console at https://console.aws.amazon.com/ec2/.
- Chose your Instance and Click on Actions → Monitor and troubleshoot → Get System Log.

- Get System log as shown below.

You can also SSH into your instance and find the login credential using the following command.
$ cat /home/ec2-user/credentials
////////////////////credentials info////////////////////
--- Nagios Core
----- Setting : Success
----- User : nagiosadmin
----- Password : tpyiokav25ngPOan
////////////////////////////////////////////////////////
You can access Nagios Core application after completing basic authentication.

Nagios
Nagios config path
/usr/local/nagios/etc/nagios.cfg
Verifying Your Configuration:
$ sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Nagios Stop
$ sudo systemctl stop nagios
Nagios Start
$ sudo systemctl start nagios
Nagios Restart
$ sudo systemctl restart nagios
Nagios Reload
$ sudo systemctl reload nagios