使用正则表达式过滤IP
[root@localhost /tmp]#ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:37:b9:96 brd ff:ff:ff:ff:ff:ff
inet 172.25.254.131/24 brd 172.25.254.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::d565:f80f:9cc1:3bbb/64 scope link noprefixroute
valid_lft forever preferred_lft forever
inet6 fe80::1d98:94c4:8ed:55e2/64 scope link dadfailed tentative noprefixroute
valid_lft forever preferred_lft forever
方法 一：
[root@localhost /tmp]#ip a |grep global|cut -d " " -f 6
172.25.254.131/24
方法二：
[root@localhost /tmp]#ip a|sed -n '9p'|cut -d " " -f 6
172.25.254.131/24
方法三：
[root@localhost /tmp]#ip a|awk 'NR==9{print $2}'
172.25.254.131/24