ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 68:f7:28:c5:ba:c1 brd ff:ff:ff:ff:ff:ff
    inet 10.31.49.59/24 brd 10.31.49.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::6af7:28ff:fec5:bac1/64 scope link
       valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether ac:d1:b8:f5:05:4f brd ff:ff:ff:ff:ff:ff