ifconfig - configure a network interface.
Display all active interfaces information:
ifconfig
Display information of all network interfaces (active or inactive):
ifconfig -a
Display information of a specific interface:
ifconfig eth0
Enable a specific interface:
ifconfig eth1 up
Disable a specific interface:
ifconfig eth1 down
Assign a ip address and netmask to a network interface:
ifconfig eth0 192.168.0.1 netmask 255.255.255.224
Change the MTU for a network interface:
ifconfig eth0 mtu 1300
Add new alias to network interface:
ifconfig eth0:0 192.168.0.2
Disable an alias of network interface:
ifconfig eth0:0 down
Change the MAC address of network interface:
ifconfig eth0 hw ether AB:CD:EF:01:02:03