How to install and configure Nagios
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Nagios is an open source monitoring system to monitor small to enterprise computer networks. With Nagios you can monitor servers, switches, applications and services. Nagios alerts you whenever there is a problem, and sends a notification when the problem has been resolved. You can receive notifications via email, SMS messages and even phone calls. Nagios is licensed under GNU GPLv2.
NSClient++ is the preferred Agent to monitor Windows server hosts. NSClient++ listens on theTCP port 12489, and the command you use to collect information from the host is check_nt. With NSClient++ you can monitor CPU load, RAM usage, disk drive usage, server running processes, etc. there are hundreds of custom plugins you can download from the Nagios official site repository to make Nagios monitor many other custom devices, services.
NRPE (Nagios Remote Plug-Ins Executor) is the preferred agent to monitor Linux hosts. The NRPE daemon binds to the 5666 port, and you collect information from the remote hosts using the check_nrpe command. With NRPE you can remotely execute Nagios plugins on other Linux/Unix machines. This allows you to monitor remote machine metrics (disk usage, CPU load, etc.).
There is no Nagios agent for embedded devices like Routers, Switches, UPSs, and many other devices were no custom software can be installed. In those devices Nagios use the NNTP protocol to gather information.
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Nagios is a very popular open source network monitoring system. with Nagios you can monitor your network resources, and receive email alerts or SMS messages on your cell phone anytime those resources run low or when any of your network devices go down. Nagios was designed to run on Linux, it cannot be installed in any other operating system as…
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If you want to monitor the temperature and humidity level of your server room with Nagios then there is a plugin for that. I personally don’t go to the server room regularly so I wouldn’t know if the AC failed in that room until probably its too late, so getting automatic alerts when the room gets too hot or too…
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If you want to check the health status of a Dell server through OpenManage with Nagios then there is a plugin for that. You will get an alert from Nagios whenever there is a physical problem with the server like the RAID, battery, and many other components. Using this plugin Nagios will basically grab all the alerts reported on the…
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