Initializing New Network Hardware
All the initial network configuration and hardware initialization for Ubuntu is normally done during installation. At times, however, you could have to reconfigure networking on your system, such as when a host needs to be moved to a different subnet or a different network, or if you replace any of your computer’s networking hardware.
Linux creates network interfaces in memory when the kernel recognizes that a NIC or other network device is attached to the system. These interfaces are unlike other Linux interfaces, such as serial communications ports, and they do not have a corresponding device file in the
/dev directory. Unless support for a particular NIC is built in to your kernel, Linux must be told to load ...