How-to-install-and-configure-Nagios-in-Ubuntu-12.04-using-Default-apptitude.md

How to install and configure Nagios in Ubuntu 12.04 using Default apptitude

Search the apptitude of nagios

# sudo aptitude search nagios 

To install nagios3 from apptitude

# sudo aptitude install nagios3

To list the installed packages of nagios

#apkg -l | grep -i nagios
 

This one only display the files of nagios

#dpkg -L nagios 3

Using this command we can see the core package of nagios

#dpkg -L nagios3-core 

This is common package of nagios and this contain all the plugins etc ..

#dpkg -L nagios3-common 

config files Will be located under

#etc/nagios/ ls -l

To have a look at plugins

#../nagios-plugins/config/

To view the plugins commands

# cat ../nagios-plugins/config/tcp_udp.cfg

this will display the commands of particular plugins commands

Default Object types will be under

# /etc/nagios3/conf.d/ls -l

Have a brife look at the plugins under

# cd /usr/lib/nagios/plugins/

#ls -l

To View the Files (Binary Files)

# file * 

To see the build and arch of the Build

# files check_icmp

To see the command of the Plugins

#./check_icmp --help

To Configure

# etc/nagios3/conf.d/

To change the default localhost to System name Which Nagios Running

# etc/nagios3/conf.d/localhost_nagios2.cfg

Open it and copy the generic host first content block and create a new file called hostname.cfg

#sudo vim /nagiosserver.cfg

And Paste the content from there copied

Change the Host name and alias as long u wish

-- ---- ---- ---- --- --- --- - -- - - - -- - - -- - 


define host{
	use		generic-host		;Name of host template to use 
	host_name	nagiosserver		
	alias		Ubuntu build linux for Monitoring 
	address		192.168.1.20
	}

--  - - - - - - - - - -  - - - -  - - - - -  - - - - - 

Save it and close

# wq!

To view the generic host for a template

#cat /etc/nagios3/conf.d/generic-host_nagios2.cfg 

To know the ports

# which nmap 

# nmap -v 192.168.1.20

Shows all opened ports

Then chooose the plugins and get installed and monitor the servers