Install Munin on CentOS 7

muninMunin is a networked resource monitoring tool that can help analyze resource trends and usage of servers and services. It offers monitoring and alerting services for servers, switches, applications, services and is designed to be very plug and play. Munin has a master/slave architecture in which the master connects to all the slaves at regular intervals and asks them for data which then is stored in RRD files.

It alerts the users when things go wrong and alerts them a second time when the problem has been resolved.

Today we will install Munin on a CentOS 7 VPS.


We will be using our SSD 1 Linux VPS Hosting plan for this tutorial.

Log in to your server via SSH:

# ssh root@server_ip

Before starting, enter the below command to check whether you have the proper version of CentOS installed on your machine:

# cat /etc/redhat-release

It should give you the underneath output:

CentOS Linux release 7.2.1511 (Core)


Make sure your server is fully up to date:

# yum update

Once the update is completed, install the EPEL repository:

# yum install epel-release

You can now install Munin and Apache using the below command:

# yum install munin munin-node httpd -y

After the installation is completed, start Munin and enable it to start on boot.

# systemctl start munin-node
# systemctl enable munin-node

When in need of a restart, you can use systemctl restart munin-node to restart Munin.

Check against the /etc/munin/munin.conf file whether you have the below lines enabled:

use_node_name yes

You can either open the file with a text editor or use the grep command. For example to check the address set, you can use:

# grep address /etc/munin/munin.conf

Using the htpasswd utility we will create a username and password for basic authentication, thus password protecting Munin. Enter the following command:

# htpasswd /etc/munin/munin-htpasswd admin

When prompted as shown below, enter the password for the admin user:

New password:
Re-type new password:
Adding password for user admin

Add your server hostname to the munin-node.conf file. Open it with a text editor of your choice. We are using nano:

# nano /etc/munin/munin-node.conf

You can add the host_name line at the end of the file. For example:


Save and close the file.

Open the Munin config for Apache and add the below lines to the /var/www/html/munin directory:

# nano /etc/httpd/conf.d/munin.conf
Order Deny,Allow
   Deny from all
   Allow from your_public_IP

After adding, the section should look like this:

<directory /var/www/html/munin>
AuthUserFile /etc/munin/munin-htpasswd
AuthName "Munin"
AuthType Basic
require valid-user
Order Deny,Allow
   Deny from all
   Allow from your_public_IP

Restart Apache for the changes to take effect:

# systemctl restart httpd

Congratulations. You have successfully installed Munin on your CentOS 7 VPS. Now open your favorite web browser and navigate to: http://your_server_IP/munin and enter the logging credentials that you’ve just set using the htpasswd utility.

Below are some of the graph snapshots we took from Munin that monitors our idle Linux VPS.




Of course you don’t have to do any of this if you use one of our Linux VPS Hosting services, in which case you can simply ask our expert Linux admins to install Munin for you. They are available 24×7 and will take care of your request immediately.

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