How to Monitor Memory, CPU and Disk on Linux using NRPE and Nagios

1. How do I monitor disk space with Nagios?
2. How do I monitor Linux with Nagios?
3. How do I monitor remote Linux systems with Nagios monitoring tool?
4. What is Nrpe in Nagios?
5. How do I use checkDisk in Nagios?
6. How can I tell if Nagios is running on Linux?
7. What is the use of Nagios in Linux?
8. How do I know if Nagios is installed on Linux?
9. How do I use Nagios monitoring tool?
10. How do I install Nagios monitoring tool on Linux?
11. How can I check my Nrpe status?
12. Which is better Nagios vs zabbix?
13. How does Nrpe work in Nagios?
14. How do you use Nrpe?

How do I monitor disk space with Nagios?

To monitor remote Linux server:

1. Keep the plugin in /usr/local/nagios/libexec directory.
2. Add following line to the nrpe.cfg file: command[check_disk.sh]=sudo /usr/local/nagios/libexec/check_disk.sh $ARG1$
3. Add the following line to /etc/sudoers file:

How do I monitor Linux with Nagios?

Download latest NRPE Plugin with wget command. Then extract the NRPE source. Compile and install the NRPE addon. Now make sure your nagios is able to connect nrpe client on remote Linux system.
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Configuring Nagios Core to Monitor the Linux Host

1. Install NRPE Plugin.
2. Add the Linux Server to the host file.
3. Configure Services.

How do I monitor remote Linux systems with Nagios monitoring tool?

1. Install Nagios Server.
2. Monitor Remote Linux Systems With Nagios. On Remote Linux System. Install NRPE Add-on & Nagios Plugins. CentOS / RHEL. Ubuntu / Debian. Configure NRPE Add-on. Configure Nagios Checks. CentOS / RHEL. Ubuntu / Debian. Test Nagios Checks. Firewall. FirewallD. IP Tables. ...
3. Check Nagios Monitoring.
4. Conclusion.

What is Nrpe in Nagios?

Nagios Remote Plugin Executor (NRPE) is a Nagios agent that allows remote system monitoring using scripts that are hosted on the remote systems. It allows for monitoring of resources such as disk usage, system load or the number of users currently logged in.

How do I use checkDisk in Nagios?

It simple runs the 'df' program, greps the line of the specified device/mountpoint and prints the Used% column, do some basic checking to see if the result is suitable, sets the corresponding level (OK, WARNING or CRITICAL) and prints the results in nagios format.
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check_disk - % used space.

How can I tell if Nagios is running on Linux?

This is a plugin for Nagios wich you can use to check if a linux service is running. This plugin uses systemctl is-active command, please check you have systemd.
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Linux Check Service.

What is the use of 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.

How do I know if Nagios is installed on Linux?

Easiest way to check the Nagios Core version is using the Nagios GUI. ~]# /usr/local/nagios/bin/nagios –help Nagios Core 4.1.

How do I use Nagios monitoring tool?

The complete process to install Nagios can be summarized in four steps:

1. Install Required Packages In The Monitoring Server.
2. Install Nagios Core, Nagios Plugins And NRPE (Nagios Remote Plugin Executor)
3. Set Nagios Password To Access The Web Interface.
4. Install NRPE In Client.

How do I install Nagios monitoring tool 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.

How can I check my Nrpe status?

The NRPE add-on is designed to execute plugins on remote Nix systems. In this setup, NRPE daemon is installed on the remote system to which services need to monitor through Nagios server.
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Step 1 – Configure NRPE on Linux Host

1. Step 1.1 – Install NRPE. ...
2. Step 1.2 – Configure NRPE. ...
3. Step 1.3 – Verify Connectivity from Nagios.

Which is better Nagios vs zabbix?

After comparing the two it is clear that Zabbix is the winner. While Nagios Core has the basics in place to run effective network monitoring it simply doesn't have the experience and configurability that Zabbix does. Zabbix is a free network monitor that performs like a product situated in the very top price bracket.

How does Nrpe work in Nagios?

NRPE is a monitoring agent and protocol that is often used to monitor remote hosts with Nagios. NRPE works with: a client (check_nrpe plugin) that runs on the Nagios server. a daemon that runs on the remote server, processes requests from the client, and returns status information.

How do you use Nrpe?

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.