Before upgrading please backup your data’s such as,
- Configuration files (/etc Directory)
- Backup you databases (MySQL or PostgreSQL)
- Important Log file (/var/log Directory)
- Other important user files.
Step 1: Switch to root user.
[geeksite@geeksite]$ su -
Password:
Step 2: Check your current kernel.
[root@geeksite]# uname -a
Linux geeksite.local 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jan 16 00:20:27 IST 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@geeksite]# cat /etc/centos-release
CentOS Linux release 6.0 (Final)
Step 3: Clean your yum cache.
[root@geeksite]# yum clean all
Step 4: List available updates.
[root@geeksite]# yum list updates
Step 5: Start upgrading CentOS.
[root@geeksite]# yum update
Step 6: Reboot the Machine.
[root@geeksite]# reboot
Step 7: Check the current kernel and release version
[root@geeksite]# uname -a
Linux geeksite.local 2.6.32-220.el6.x86_64 #1 SMP Mon Jan 16 00:48:22 IST 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@geeksite]# cat /etc/centos-release
CentOS release 6.2 (Final)
That’s all Now you have latest version of CentOS 6 on your Machine.