Updating the kernel from version 2.6.18-128.1.6.el5 to 2.6.18-128.4.1.el5 on Red Hat Enterprise Linux 5.3Edit
$ sudo -i
# yum --disableexcludes=all check-update
# yum --disableexcludes=all update 'kernel*'
# reboot
$ sudo -i
# yum --disableexcludes=all check-update
# yum --disableexcludes=all update 'kernel*'
# reboot