自动生成linux网卡配置脚本分享

补充：这是对于第一次添加的网卡有效，如果需要重复添加和删除后自动配置，需要更改脚本，改为根据ip a命令的信息来修改。

#!/bin/bash
#update:2013-02-25
#author:ihuotui
#version 0.1

cdate=$(date '+%y%m%d')
num=$(ifconfig -a | grep eth | wc -l)
echo "ethx=" $num >> ethx

for ((n=1;n<${num};n++))
    do

       if [ -e /etc/sysconfig/network-scripts/ifcfg-eth${n} ] ; then

           sed -i '/hwaddr/d' /etc/sysconfig/network-scripts/ifcfg-eth${n}
           ifconfig -a | grep "eth${n}" | awk '{print "hwaddr=\""$5"\""}' >> /etc/sysconfig/network-scripts/ifcfg-eth${n}   

      else

           touch /etc/sysconfig/network-scripts/ifcfg-eth${n}
           ifconfig -a | grep "eth${n}" | awk '{print "hwaddr=\""$5"\""}' >> /etc/sysconfig/network-scripts/ifcfg-eth${n}
           echo nm_controlled="\"yes\"" >> /etc/sysconfig/network-scripts/ifcfg-eth${n}
           echo onboot="\"yes\"" >> /etc/sysconfig/network-scripts/ifcfg-eth${n}
           echo type="\"ethernet\"" >> /etc/sysconfig/network-scripts/ifcfg-eth${n}
           echo bootproto="\"dhcp\"" >> /etc/sysconfig/network-scripts/ifcfg-eth${n}
           echo uuid="\"2460e474-fad8-4b46-baba-da6f45ae158"${n}"\"" >> /etc/sysconfig/network-scripts/ifcfg-eth${n}
           echo device="\"eth"${n}"\"" >> /etc/sysconfig/network-scripts/ifcfg-eth${n}

           continue
       fi
    done