Just have look at the first post of this thread, all comands are explained.

My command line for example:

NsGpuCNMiner.exe -a 1 -o stratum+tcp://bcn.pool.minergate.com:45550 -u youremailaddress -p x
(Windows)
-a 1 depends on you GPU, is also explained in the first post.

For Linux just remove .exe