root@ubuntu:~# cat 1
2: eth0:mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether fa:16:3e:85:5a:08 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.18/24 brd 192.168.0.255 scope global dynamic eth0
valid_lft 83317sec preferred_lft 83317sec
inet6 fe80::f816:3eff:fe85:5a08/64 scope link
valid_lft forever preferred_lft forever
root@ubuntu:~# cat 1|awk -F"[ /]+" '/inet /{print $3}'
192.168.0.18
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