Thank you XTC.

"The ifconfig command is used on Solaris (unix) machines to assign an address to a network interface or to configure your network interface. During system startup, ifconfig is called to define the network address of each interface present on your Solaris machine. ifconfig may also be used to redefine a network interface's address or other operating parameters, or to display the current configuration on an interface."

Is this originally a *nix command? or I think I should ask, is this predominantly used for *nix systems? Thanks again.