補充：這是對于第一次添加的網卡有效，如果需要重復添加和刪除后自動配置，需要更改腳本，改為根據ip a命令的信息來修改。

代碼如下:
#!/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