Nagios CentOS 3 – Setting Up Nagios

Nagios CentOS 3 – Setting Up Nagios

The next part of the installation is to set up Nagios ready for use which includes the following steps :-

  1. Setting up the password file
  2. Configuring the CGI file
  3. Configuring the nagios.cfg file

Setting Up The Password File

The first step in setting up Nagios is to create the password file which will be used to control access to the system.  To create the password file perform the following steps :-

  • In the command prompt execute the following command :-

htpasswd -c /etc/nagios/htpasswd.users nagiosadmin

  • When prompted enter the password desired for the nagiosadminuser
  • When prompted confirm the password for the nagiosadmin user

Configuring The CGI File

The CGI file is already configured for the use of the user nagiosadmin following installation so there is nothing to change if using the default nagiosadmin user.

If you are using a different username then perform the following steps :-

  • Edit the file /etc/nagios/cgi.cfg and replace all references to thenagiosadmin user with the username configured in the password file
  • Check and confirm that the setting below is set to 1 :-


  • Save and Exit the file

Configuring The Nagios.cfg File

As with the CGI file, the nagios.cfg file is already configured for a basic installation.

The contents of the nagios.cfg file will be covered in subsequent articles as they are too in depth for this article.