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Nagios on RHEL 6

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Installing EPEL Repository Download epel release repo from below URL: [root@]$ wget -c  http://ftp.jaist.ac.jp/pub/Linux/Fedora/epel/6/i386/epel-release-6-7.noarch.rpm If in case you are using RHEL5 you can download this epel-release from below URL: http://download.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm Installing pre-requisites packages Install the pre-requisites software’s like: · Php · Gcc, Gcc++ · Httpd · Gd · Perl [root@]$yum install php gcc* httpd gd perl –y Installing Nagios and some additional packages Install major packages like: · Nagios · Nagios-common · Nagios-plugins · And some basic plugins like nagios-plugins-ping, nagios plugins-http, nagios-plugins-disk etc. [root@]$yum install nagios nagios-common nagios-plugins nagios-plugins-http nagios-plugins-disk nagios-plugins-ping -y Major configuration files To configure Nagios, you first need to fin...
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RHEL 5 vs RHEL 6 ?

If by any chance you are appearing for an interview for a position if Linux Administrator then the most common question which is asked is what is the difference between RHEL5 and RHEL6 ? Virtualization: In RHEL 6 KVM (Kernel based Virtual Machine) was used as a hypervisor but in the earlier releases of RHEL XEN was used as a hypervisor. The main advantage of KVM is that it supports the installation of many virtual machines/operating systems like Windows, Linux, Solaris and also it is very easy to manage those virtual machines. Security: RHEL6 has an enhanced version of SELinux(Security Enhanced Linux) now, Basically now the features are more improved and there are various new set of rules which are added to SELinux one of such rule/feature is of SVirt which provides security to virtual machines from hackers. EXT4: It stands for Extended 4, It has various new advantages then EXT2/3 which were used in earlier version(s) of RHEL. EXT4 is comparatively more faster and easy t...
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