How to Upgrade from CentOS 6.2 to CentOS 6.3

linux centos 6.3CentOS 6.3 had released on 2012-07-09 with the kernel version 2.6.32-279. CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by our Upstream OS Provider (UOP).
For version CentOS-4.x and CentOS-5.x, it is recommend to reinstall rather than attempt an inplace upgrade from CentOS-4 or CentOS-5 to CentOS 6.3. Direct upgrade from CentOS 6.x to CentOS-6.3 for i386 and x86_64 Architectures is highly recommendeded. The ‘yum update’ should move your machine seamlessly from any previous CentOS-6.x release to CentOS-6.3, unless you have edited your yum configs. Follow this steps to upgrade the CentOS-6.x to CentOS6.3

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Check older version :

[root@host1 ~]# cat /etc/redhat-release
CentOS release 6.2 (Final)
or
[root@host1 ~]# cat /etc/issue
CentOS release 6.2 (Final)
Kernel \r on an \m

Official way to do upgrade:

[root@host1 ~]# yum clean all
[root@host1 ~]# yum update -y
[root@host1 ~]# reboot

Check latest version :

[root@host1 ~]# cat /etc/redhat-release
CentOS release 6.3 (Final)

or

[root@host1 ~]# cat /etc/issue
CentOS release 6.3 (Final)
Kernel \r on an \m
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