I want 2 change my first name legally according to Indian law specially on my educational certificates. How ?

i want 2 change my first name legally according to indian law specialy on my educational certificates. can i apply for a job with changed name.? i am 25 year old garaduate . live in india

I want 2 change my first name legally according to Indian law specially on my educational certificates. How ?
i want that done too :S