2.3. ia64 Architecture

If your system only has 512MB of RAM, attempting to install Red Hat Enterprise Linux 5.2 may fail. To prevent this, perform a base installation first and install all other packages after the installation finishes.
Using yum to install packages from the 32-bit Compatibility Layer disc may fail. If it does, it is because the Red Hat package signing key was not imported into the RPM database. This happens if you have not yet connected to Red Hat Network and obtained updates. To import the key manually, run the following command as root:
```
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
```
```
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
```
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Once the Red Hat GPG key is imported, you may now use yum to install packages from the 32-bit Compatibility Layer disc.
Note that when installing from this disc, it is advisable to use yum instead of rpm to ensure that base OS dependencies are addressed during installation.
When upgrading a large number of packages with yum update, the update process will take longer to finish than previous versions.

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