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system upgrade

How To Upgrade CentOS Linux To Version 5.2

CentOS Linux 5.2 has been released and available for immediate update via yum command or
the i386 and x86_64 Architectures. From the announcement page:

CentOS-5.2 is based on the upstream release EL 5.2.0, and includes packages from all variants including Server and Client. All upstream repositories have been combined into one, to make it easier for end users to work with. And the option to further enable external repositories at install time is now available in the installer.

How do I update from CentOS-5.0 and 5.1 to 5.2?

Simply type the following command as root user:
# yum update
# yum upgrade
Sample output:

shadow-utils-4.0.17-13.el 100% |=========================|  50 kB    00:00
---> Package shadow-utils.i386 2:4.0.17-13.el5 set to be updated
---> Downloading header for cups to pack into transaction set.
cups-1.2.4-11.18.el5_2.1. 100% |=========================| 165 kB    00:00
Transaction Summary
Install      8 Package(s)
Update     191 Package(s)
Remove       2 Package(s)
Total download size: 298 M
Is this ok [y/N]: y

Finally, reboot your computer, enter:
# reboot