I have two servers running two different versions of RedHat Linux. Here is the output from the "cat /etc/redhat-release" and "uname -r" commands for the two servers:
1. a) Red Hat Linux Advanced Server release 2.1AS (Pensacola)
b) 2.4.9-e.38smp
2. a) Red Hat Enterprise Linux ES release 3 (Taroon update 1)
b) 2.4.21-9.ELsmp
When I go to the Red Hat website at redhat.com and look for documentation and manuals, in many places I see the different versions of Red Hat listed as version 7.1, 7.2, 7.3, 8.0, 9.0, etc. I am a bit confused. How does the release and kernel version information from /etc/redhat-release and uname correspond to these versions of 7.1 thru 9.0? How can I determine what manuals and documentation I are appropriate to the versions I am currently running?
Soln
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/etc/redhat-release tells you what release version you have (e.g., Redhat 9.0, RHEL 2.1AS, RHEL 3ES). In this case you have:
RedHat Enterprise Linux 2.1 Advanced Server (Red Hat Linux Advanced Server release 2.1AS (Pensacola))
RedfHat Enterprise Linux 3.0 Enterprise Server (Red Hat Enterprise Linux ES release 3 (Taroon update 1))
The complete documentation set for those is on CD/DVD that you can download from your RHN login at https://rhn.redhat.com.
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You can also check the manuals etc from hear (no need to login)
https://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/
https://www.redhat.com/docs/manuals/enterprise/RHEL-AS-2.1-Manual/
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What is the difference between the 2.1 and 3.0 releases above and Redhat 8.0, 9.0, etc? Do you know? I am new to Linux and also the Red Hat releases/distributions and what the differences may be between them.
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Redhat 8 and 9 used to be the free downloadable versions of redhat but are obsolete now. The current free versions of redhat are called fedora-core, and the current versin is fedora-core 4. Check the following site for more info on the fedora-core project:
http://fedora.redhat.com/
The 2.1 and 3.0 versions are the enterprise and commercial versions of redhat. 2.1 is just older than 3.0. You'll also notice that the kernel version of 2.1 is older than that of 3.0.
The current version of redhat enterprise version is 4.0
With the commercial version you get yourself support from redhat, so that is mainly what you pay for. Another difference to the free redhat is that all software has long been tested and stable, that on the free version isn't as tested, but may get used in the next version of RH. There is also a clone of the commercial versions of redhat, you can download that from:
http://centos.org
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