Hi,

I am new to linix. Can u please tell me that what is the difference among linux, unix and solaris.

And also i am not understanding different versions of linux like reghat linix 9, redhat linux AS 4.0, redhat linum EL5. Can u tell me the difference.
Thank You

regards Adnan

Linux started out as a UNIX 'clone' that would run on cheap x86 hardware (UNIX used to only run on proprietary chips made by the various UNIX vendors). Solaris is Sun's (crappy IMO) version of UNIX. Solaris is one of the few UNIX OS' to now run x86 hardware.

If you google 'linux vs. unix', you will find plenty of good articles/info about the topic.

Red Hat is a vendor that produces an enterprise class version of Linux. They have a few different classifications of their Linux offerings; AS=Advanced Server, EL=Enterprise Linux, etc. They've changed their naming scheme a few times so it will be easier for you read here and here to figure out the info you wanted.

I like these questions, because it gives me an excuse to wheel out my favourite Half Man, Half Biscuit quote:
Is it the spelling?

Yes yes, all very different. Yet very similar. All depends on what you want to do. If you want to know what linux is:

http://www.linux.org/

Solaris:

http://http://www.sun.com/software/solaris/

UNIX:

http://www.unix.org/

And this one is especially for you:

Look At This First!!