can u tell me what are commands and where we have write these commands .plz let me knw about this and give some of the commands like how to restarts the game while playing .

Can you please specify commands? Do you want client commands or server ones?

sever ones

sever ones

 

Does your server have B3?

don't knw ???

from where do i find it ?

Check the B3 section:

viewtopic.php?f=30&t=11583