hello!
 

i am a student of masters program in networking in sweden. Linux became my interest 3 months back and initially i didnt like it but gradually i began to enjoy.
i am sure this is a good platform to learn linux and i have already enjoyed viewing few posts.

my first question.
i had linux installed along with windows. i reinstalled windowx and here u go. u know what would have happened after that.
how can i recover linux now as i didnt make any boot diskette

Let us know your distribution distro

Probably, you have just blown up your Boot loader, and just need to restore it.