how do i change my nickname????

ilanCP

i cant play online because i need change my name

Dss0

I suppose you're talking about bo2?
Read the readme before asking questions.
But since i'm a really really nice guy i'm gonna paste the instructions here:

Change your name: click the tilde key ~ to open console then type: name <insert your name here> - You MUST change your name to play on public servers or you will be auto-kicked until you do!