Updating to Red Hat Enterprise Linux 5.4Edit

Created 2009-09-02, updated 2017-05-18

Update everything at once, including the kernel:

# yum --disableexcludes=all check-update
# yum --disableexcludes=all update

Check if there is anything more to be installed (there was):

# yum --disableexcludes=all check-update
# yum --disableexcludes=all update

Reboot:

# reboot