ifconfig
http://www.thegeekstuff.com/2009/03/ifconfig-7-examples-to-configure-network-interface/
ifconfig eth0:2 192.168.100.10 netmask 255.255.255.0 up
up: activate the interface
down: deactivate the interface
[-]arp: enable / disable the use of arp
[-]allmulti: enable / disable reception of hardware multicast packets
[-]broadcast addr: enable / disable accepting datagram destined for broadcast address
mtu N: set mtu
netmask mask: set network mask
irq irq: set IRQ
hw type addr: set hardware address for certain device such as X.25
page revision: 1, last edited: 08 Apr 2016 06:07