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ifconfig.md

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ifconfig

display information about network interfaces ifconfig

display MAC addresses ifconfig | grep ether

set a new MAC address to en0 sudo ifconfig en0 ether aa:bb:cc:dd:ee:ff

display local IP addresses ifconfig | grep 'inet ' | grep -v '127.0.0.1' | cut -d' ' -f2

Basic Usage

Display basic information: ifconfig

Set network parameters: sudo ifconfig <new_address>

ifconfig

Network Interface Configurator.

  • View network settings of an ethernet adapter:

    ifconfig eth0

  • Display details of all interfaces, including disabled interfaces:

    ifconfig -a

  • Disable eth0 interface:

    ifconfig eth0 down

  • Enable eth0 interface:

    ifconfig eth0 up

  • Assign IP address to eth0 interface:

    ifconfig eth0 ip_address

To display network settings of an interface:

ifconfig

To display all interfaces, even if down:

ifconfig -a

To take down / up the wireless adapter:

ifconfig wlan0 {up|down}

To set a static IP and netmask:

ifconfig eth0 192.168.1.100 netmask 255.255.255.0

You may also need to add a gateway IP:

route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1