Security updates and installation using YUM - RHEL 5/6/7

Hello All, 

I had come across a situation where I wanted to check, verify and update the security on the different releases of RHEL, since I was not able to find all at one place. I thought of putting across all at one place. I thought of keeping all at once place helps and so sharing in public !

	Operating systems
Explanation on security updates on RHEL	RHEL 5	RHEL 6	RHEL 7
yum could install the security updates using the plugin yum-security	yum install yum-security	yum install yum-plugin-security	No plugin required as it is already part of yum
list all available errata without installing	yum list-sec	yum updateinfo list available
list all available security updates without installing	yum list-security --security	yum updateinfo list security all yum updateinfo list sec
list of currently installed security updates	yum list-sec	yum updateinfo list security installed
list all security update with verbose descriptions	yum list-sec
apply all security updates from RHN	yum -y update --security
updates based on CVE reference	yum update --cve <CVE>
view available advisories by severity	yum updateinfo list
more detailed information about advisory before applying	yum updateinfo RHSA-2015:XXXX
apply only one specific advisory	yum update --advisory=RHSA 2015:XXXX
More information could be found at	man yum-security

First post in year 2016, wishing all of you - HAPPY NEW YEAR :)

Thanks