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Are all subscription numbers unique?
Subscription numbers are unique per order, not per system. The subscription number represents the Red Hat Enterprise Linux features included with a subscription. It's primarily used to configure the installer. Multiple systems that have identical subscription features and service level agreement (SLAs) can be installed with the same subscription number.
What if I have a 30-day evaluation copy of Red Hat Enterprise Linux?
If you received a 30-day evaluation copy from our website, there's no need to enter a subscription number. Simply click Skip when prompted for the number during installation.
If you received your evaluation from a sales representative or from Red Hat Customer Service, you must activate the subscription number before the evaluation copy can be used. Activate your subscription number here (RHN login required). During installation, you can enter this subscription number or click Skip.
When am I required to use a subscription number?
The subscription number is optional during installation if the subscription is already active. The installer provides an opportunity to enter the subscription number for both attended and unattended (such as Kickstart) installations.
How do I add a subscription number after installation if I skip it during installation?
If you skip entering the number during installation you don't have to enter it later. Simply register your system to RHN manually using the rhn_register command. You don't need the subscription number when registering to RHN as long as the subscription has been activated.
What happens if I click “Skip” and don#39;t enter a subscription number?
If you don't enter the subscription number, the installer will proceed to install the core operating system. But the installer won't be able to install additional packages that may have been purchased with the subscription. These packages would be from channels other than the base channel, such as Storage or Virtualization. Any packages not installed during system installation can be manually added post-installation after the system is registered to RHN.
Why should I use the subscription number?
Entering a Red Hat Enterprise Linux 5 subscription number lets the installer:
Access the full set of supported packages included with the subscription at install time.
Automatically register the system to all Red Hat Network (RHN) channels included with the subscription at install time.
What is a subscription number (sometimes referred to as an installation number or a registration number) and how do I use it?
The Red Hat Enterprise Linux 5 subscription number is a 16-character text string that can be used during the installation process. (Note: Red Hat Enterprise Linux 5 is the only version of Red Hat Enterprise Linux that requires an installation number.)