CentOS 6
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Nagios : Install
2015/02/23
 
Install Nagios which is an enterprise open source monitoring system.
[1]
[2]
[3] Install Nagios.
Also Install basic plugins to monitor nagios server itself.
# install from EPEL

[root@dlp ~]#
yum --enablerepo=epel -y install nagios nagios-plugins-{ping,disk,users,procs,load,swap,ssh,http}
[4] Configure Nagios.
[root@dlp ~]#
vi /etc/httpd/conf.d/nagios.conf
# line 15-19, change settings to set access permissionlike follows ( set for line 32-36, too )

#
Order allow,deny
#
Allow from all
Order deny,allow
Deny from all
Allow from 127.0.0.1
10.0.0.0/24
# add nagios admin user

[root@dlp ~]#
htpasswd /etc/nagios/passwd nagiosadmin

New password:
# set any password

Re-type new password:
Adding password for user nagiosadmin
[root@dlp ~]#
/etc/rc.d/init.d/nagios start

Starting nagios: done.
[root@dlp ~]#
/etc/rc.d/init.d/httpd restart

Stopping httpd:
[ OK ]

Starting httpd:
[ OK ]

[root@dlp ~]#
chkconfig nagios on

[5] Access to the "http://(Nagios server's hostname or IP address)/nagios/" from a client which is in the network allowed by Nagios server and authenticate with the Nagios admin user "nagiosadmin" to login.
[6] After successing authentication, the Nagios admin site is displayed.
[7] It's possible to view system status to click "Tactical Overview" and so on.
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