环境：CentOS6.8-2.6.32-x86_64bit 网卡：eht0 eth1 lo
#!/bin/bash #creation for rich #time for 2017-11-22
[ -d /etc/sysconfig/network-scripts ]&&
cd /etc/sysconfig/network-scripts ||exit ls|grep ifcfg|nl
read -p "pls select you num:{1|2|3..}" num
if [ $num -eq 1 ];then cat ifcfg-eth0|grep IPADDR|awk -F [=] '{print $2}' elif [ $num -eq 2 ];then cat ifcfg-eth1|grep IPADDR|awk -F [=] '{print $2}' elif [ $num -eq 3 ];then cat ifcfg-lo|grep IPADDR|awk -F [=] '{print $2}' else echo "pls input correct num.." exit fi
