i have 2 sites that i own. Is there a way i can get all my members from site A to be site B. Both are 2 differnet sites so i just need to transfer the members and thats it. Is there a way to transfer the members. Or interlink the sites so that he can access site A through his Site B password and vice versa.

Do you mean this as a one time transfer or constant.
E.G. User x signs up on site A and he is automatically signed up on Site B?

You will need to create a secure bridge which will probably require SSH.

Please. guide me on both the procedures, if it is one time how can it be done and if it is continous then how can it be done.