Your computer's Network Adapter Address must be registered in order to receive network access. The Adapter Address is a unique number associated with your computer's network adapter. It is also called a Physical Address, Hardware Address, Ethernet ID or MAC on various systems. Follow the appropriate instructions for your Operation System to locate your Adapter Address.
Not all Linux distributions are the same but most will have ifconfig installed.
In a terminal window type ifconfig and return.
You'll see a list of interfaces. Your wireless interface will likely be named wlan0 or wifi0. The wireless MAC address? will be in the field labeled HWaddr.
You can also use iwconfig to find your wireless MAC address if you have it installed.