ip 指令和 ifconfig 的功能有些類似，但命令可以更加簡短
1. 列出所有網路介面 IP
# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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
112: eth0@if113: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
link/ether 9e:5b:bb:11:35:a7 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet 192.168.1.17/24 brd 192.168.1.255 scope global eth0
valid_lft forever preferred_lft forever[@more@]2. 單獨列出某一網路介面
# ip addr show eth0
# ip a s eth0
112: eth0@if113: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
link/ether 9e:5b:bc:14:35:a7 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet 192.168.1.17/24 brd 192.168.1.255 scope global eth0
3. 列出網路路由
# ip route
# ip r
default via 192.168.1.254 dev eth0
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.17
取出 IP
# ip a s eth0 | grep ‘inet ‘ | awk ‘{print $2}’ | awk -F’/’ ‘{print $1}’
192.168.1.17
# ip r | grep src | awk ‘{print $9}’
192.168.1.17
取出 mac address
# ip a s eth0 | grep ‘link/ether’ | awk ‘{print $2}’
9e:5b:bb:11:35:a7