Hey Guys... Google does not help you?
If I Google your query, it's easy to see the answer:
Spacewalk (software) - Wikipedia
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From wiki .....
Quote:
Red Hat Satellite 5
Red Hat Satellite 5 is a licensed downstream adaption of Spacewalk with added functionality to manage Red Hat Enterprise Linux Subscriptions.
In the active years of the Red Hat Satellite 5 lifecycle Spacewalk was simply known as the upstream project for Satellite. The relationship between Spacewalk and Red Hat Satellite 5 was analogous to the relationship between Fedora and Red Hat Enterprise Linux. With the emergence of Red Hat Satellite 6 with based on a fundamentally different toolset, end of lifecycle phase of Red Hat Satellite 5 and the emergence of downstream spacewalk based offerings from Oracle and SUSE newer versions of Spacewalk may not have this close relationship.
As of 2017 Red Hat Satellite 5 is in long-term support mode with a current EOL date of January 31, 2020.[20]
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