Quick Answer: What is Nagios in Linux?

Nagios provides complete monitoring of Linux operating systems and distributions – including operating system metrics, service state, process state, file system usage, and more. When you use Nagios to monitor your Linux environment, you’re using one of the most powerful Linux monitoring tools on the planet.

What is Nagios and how it works?

Nagios Core /ˈnɑːɡiːoʊs/, formerly known as Nagios, is a free and open-source computer-software application that monitors systems, networks and infrastructure. Nagios offers monitoring and alerting services for servers, switches, applications and services.

What are the main benefits of Nagios?

Implementing effective server monitoring with Nagios offers the following benefits:

  • Increased server, services, process, and application availability.
  • Fast detection of network and server outages and protocol failures.
  • Fast detection of failed servers, services, processes and batch jobs.

Is Nagios free or not?

Yes! Nagios XI is available free of charge for monitoring small environments. Nagios XI installations with a free license are limited to monitoring up to seven (7) hosts (nodes) and up to 100 total host and service checks. The free license is self supported.

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How configure Nagios on Linux?

  1. Step 1: Install Required Dependencies. …
  2. Step 2: Create Nagios User and Group. …
  3. Step 3: Download Nagios Core 4.4. …
  4. Step 4: Extract Nagios Core and its Plugins. …
  5. Step 5: Customizing Nagios Configuration. …
  6. Step 6: Install and Configure Web Interface for Nagios. …
  7. Step 7: Compile and Install Nagios Plugin.

Who uses Nagios?

Who uses Nagios? 219 companies reportedly use Nagios in their tech stacks, including Uber, Twitch, and Dropbox.

How do I run Nagios?

Starting Nagios Core

  1. Init Script: The easiest way to start the Nagios Core daemon is by using the init script like so: /etc/rc.d/init.d/nagios start.
  2. Manually: You can start the Nagios daemon manually with the -d command line option like so: /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg.

What are the features of Nagios?


  • Centralized view of entire monitored IT infrastructure.
  • Detailed status information available through web interface.
  • Fast detection of infrastructure outages.
  • Alerts can be delivered to technical staff via email or SMS.
  • Escalation capabilities ensure alert notifications reach the right people.

Is Nagios a DevOps tool?

Nagios monitors your entire IT infrastructure to ensure systems, applications, services, and business processes are functioning properly. It is integral to the DevOps lifecycle and is a must for DevOps Certification.

Does Nagios use SNMP?

Nagios provides complete monitoring of SNMP (Simple Network Management Protocol). SNMP is an “agentless” method of monitoring network devices and servers, and is often preferable to installing dedicated agents on target machines.

Is zabbix safe?

It is possible to apply SSL encryption to all Zabbix communications, so the system is safe.

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Is icinga2 free?

Where Icinga stands out is that it is free and open source software, which means that it can be freely distributed with its source code, edited, and customized with the community in mind.

Which OS can Nagios be installed on?

Operating System (OS) Monitoring With Nagios

Nagios supports monitoring of Windows, Linux, Unix, Solaris, AIX, HP-UX, and Mac OS/X operating systems.

How install Nrpe in Linux?

How To Install NRPE on CentOS/RHEL 7/6

  1. Step 1 – Install EPEL Repository. NRPE packages and plugins are available under EPEL yum repository, Enable EPEL repository using one of below commands. …
  2. Step 2 – Install NRPE and Nrpe-plugins. …
  3. Step 3 – Configure NRPE. …
  4. Step 4 – Start NRPE Service. …
  5. Step 5 – Test NRPE from Nagios Server.

10 нояб. 2017 г.

How do I know if Nagios is running?

Check that nagios is Running

As opposed to just checking that a web server is running on the classroom PCs, you could also check that t he nagios3 service is available, by requesting the /nagios3/ path. This means passing extra options to the check_http plugin.

How do I add a Linux server to Nagios monitoring?

Please use the below instructions to install Nagios Plugins and NRPE daemon on the Remote Linux Host.

  1. Step 1: Install Required Dependencies. …
  2. Step 2: Create Nagios User. …
  3. Step 3: Install the Nagios Plugins. …
  4. Step 4: Extract Nagios Plugins. …
  5. Step 5: Compile and Install Nagios Plugins. …
  6. Step 6: Install Xinetd.

8 нояб. 2013 г.

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