Installation guide

The upgrade process preserves existing configuration files by renaming them with an .rpmsave
extension (for example, sendmail.cf.rpmsave). The upgrade process also creates a log of its
actions in /root/upgrade.log.
Warning
As software evolves, configuration file formats can change. It is very important to carefully
compare your original configuration files to the new files before integrating your changes.
Note
It is always a good idea to back up any data that you have on your systems. For example, if
you are upgrading or creating a dual-boot system, you should back up any data you wish to
keep on your hard drive(s). Mistakes do happen and can result in the loss of all of your data.
Some upgraded packages may require the installation of other packages for proper operation. If you
choose to customize your packages to upgrade, you may be required to resolve dependency
problems. Otherwise, the upgrade procedure takes care of these dependencies, but it may need to
install additional packages which are not on your system.
Depending on how you have partitioned your system, the upgrade program may prompt you to add
an additional swap file. If the upgrade program does not detect a swap file that equals twice your
RAM, it asks you if you would like to add a new swap file. If your system does not have a lot of RAM
(less than 256 MB), it is recommended that you add this swap file.
24 .2. Upgrading Your Syst em
The Upgrade Examine screen appears if you have instructed the installation program to perform an
upgrade.
Note
If the contents of your /etc/redhat-release file have been changed from the default, your
Red Hat Enterprise Linux installation may not be found when attempting an upgrade to Red
Hat Enterprise Linux 5.11.
You can relax some of the checks against this file by booting with the following boot
command:
linux upgradeany
Use the linux upgradeany command if your Red Hat Enterprise Linux installation was not
given as an option to upgrade.
To perform an upgrade, select Perform an upgrade of an existing installation. Click
Next when you are ready to begin your upgrade.
Red Hat Ent erprise Linux 5 Inst allat ion G uide
24 8