Hi Everybody,
This may not be a technical question, but i want to ask it any way.
As all companies now a days ask for Linux Cert(Redhat,Sun,Unix,etc..).but
[1]What all types of jobs(Opportunities) may a fresher get in linux after certification, ( I am waiting for my RHCE exam).
[2]what is(or will be) a Career growth path in each of those opportunities.
[3]Hope my question is answerable and expecting for detailed job description.
Thank you .

No idea what "a fresher" is, so no way of knowing. I'm assuming you mean a new graduate, and in that case, you can get any job you can get...you've got no experience, and a certification will be almost pointless, since many new grads have them. If you're offered any entry-level job, take it.
No way of knowing, since things can change direction rapidly in IT.
You expect someone to give you a detailed job description, based on a certification you don't have, not knowing anything about you, your experience, or what you're interested in?? Don't think that's going to happen.

When I was at Uni, a fresher was a 1st year
In that case, you can try to get an internship during the holidays. In contrast to the above, I'd say its unusual for new Uni grads to have industry certs of the level of RHCE or SUN SysAdmin. Certainly they've all got degrees ...
One thing you need to decide (if its not too early in your career) is what area you want ie Programmer, DBA, SysAdmin, Network Engineer?
We need more info about your current situation and CS interests to even begin..

If, in fact, fresher means freshman at a University, then get a student job helping out in some department that uses linux. Do anything. I've seen a 16 year old walk in and take a job as a mail clerk assistant just so he could be in this software company. Next thing, he's having lunch with the software testing crew and cracking code. I've also seen people start as student employees, go out to industry after graduation, and come back to the University as experienced sysadmins. You really need to just grab the reins and jump on.

by fresher OP means to say hes just out of college with some degree. Has completed some education with no formal experience.
Being an RHCE can give you an edge but it certainly is not the only criterion and it does not make you an expert.
Get whatever experience you can get. Else destiny will take you where you are destined to be.

Hay thanks very much, The direction is all i needed,Those are pretty good option i can work on. THANKS ANGAIN.

@OP

Cent Os should be CentOS and Ubantu should be Ubuntu in your profile.