Upgrade CentOS 5.4 to 5.5

方法一:

yum clean all
yum update glibc\*
yum update yum\* rpm\* python\*
yum clean all
yum update
reboot

方法二:

Clean All Packages
# yum clean all

The following command will get a list of packages that are going to be updated.
# yum list updates

Lets begin upgrading CentOS 5.4 to 5.5
# yum update

Finally reboot the server for Kernel changes to take effect
# reboot

檢查版本
lsb_release  -a




[references]
http://www.how2centos.com/upgrading-centos-5-4-to-5-5/
http://www.unixmen.com/news-today/999-centos-55-is-out-upgrade-now-from-centos-54-to-55