Upgrade / updating CentOS 5.3

here some step upgrade and update for CentOS 5.3 (Work for Me!!)

# yum clean all
# yum update

# yum upgrade

# reboot

or you can upgrade your kernel using

# yum upgrade kernel

than

# reboot


updating package :
example

yum list updates {package-name}
yum list updates 'package-name*'
yum list updates '*package-name*'

or

# yum list updates 'php*'
or
# yum list updates 'kernel*'

you can currently list your installed package by using

# rpm -q kernel

do multiple

# yum list installed 'kernel*' 'php*'

or update your kernel by using

# yum update kernel.i686

than reboot your box

That All!