Hello all Gurus !
I just want to know, the recommended certification for job point of view , recommended certification for knowledge point of view and THE VALIDITY OF ALL available Linux Certifications...

What do you mean by "validity"?. There are no official certifications required for the profession of being a sysadmin. You don't need to pass a bar exam or anything, and all the commercial certifications are inevitably underpinned by a commercial desire to propagate the image of their product. So it's all very subjective as to what someone takes your certification to be worth. That said it's hard to take a cert like an RHCE and not have a reasonable idea of the level that that candidate is at. I've met some pretty useless RHCE's at the same time... and experience is often worth a lot more than a cert. Like driving. Passing a driving test doesn't mean you're a good driver, just that you got some ticks in boxes. It's the next 5 / 10 / 20 years that make you a good or bad driver.

This is like a windows vas. Linux debate...no clear answer. Different companies hold different values to different certs. Look @ whats asked in your line of career path and work towards that. Different strokes for different folks leaves the blind wanting more pokes

Both the answers are pretty good and thanks to acid_kewpie & raevin for your concern.

But in my case I am an alien , i.e. moving to a different country for the first time and I've just completed my graduation in Computer Engg. And so I thought the certification might help me in getting the job in field of my interst interest (Linux).

And as per my thinking the vendor specific certificate would help me wherever I go, and so I should go for LPIC 1,2,3.

Am I right ? ? ?

I'm not sure what you mean by this statement. If you're looking for a "vendor specific" certificate, options are available from Red Hat and Novell.

While LPIC is an excellent program, the LPIC certificates are explicitly "vendor neutral". For example, the LPIC 1 exams include topics associated with both the rpm and the dpkg commands for package management -- so you'd need to work from both a Red Hat (SUSE) and a Debian (Ubuntu) distribution to study for that exam.