Steps to configure Nagios & SNMP on CentOS 6.3

Steps to configure Nagios on CentOS

Command to configure required packages:

# yum install httpd gcc glibc glibc-common gd gd-deve1 php

# yum -y install net-snmp-utils

# yum -y install wget

Command to create and setup a User and Group for Nagios:

# useradd -m nagios

# groupadd nagcmd

Commands to add Nagios User and Apache User to Nagios Group:

# usermod -a -G nagcmd nagios

# usermod -a -G nagcmd apache

Command to create directory for Nagios download:

# mkdir /etc/downloads

Commands to download Setup and Plugin files for Nagios:

# wget http://prodownloads.sourceforge.net/sourceforge/nagios/nagios-3.2.3.tar.gz

# wget http://nagios-plugins.org/download/nagios-plugins-2.0.tar.gz

Commands to extract .tar.gz file which we have downloaded:

# tar xzf nagios-3.2.3.tar.gz

# tar xzf nagios-plugins-2.0.tar.gz

Commands to configure and compile Nagios:

# cd nagios-3.2.3

# ./configure –with-command-group=nagcmd

# make all

# make install

# make install-init

# make install-config

# make install-commandmode

# make install-webconf

Commands to configure Apache:

# htpasswd -c /usr/local/nagios/etc/htpasswd.users admin

# service httpd restart

Commands to install Nagios Plugin files:

# ./configure –with-nagios-user=nagios –with-nagios-group=nagios

# make

# make install

Steps to configure NET-SNMP on CentOS 6.3

# yum install net-snmp-utils

# yum install net-snmp

# cd /etc/snmp

# vi smpd.conf

Change group name

# service snmp restart

# chkconfig snmpd on

# snmpwalk -v 1 -c group name -O e 127.0.0.1