腳本任務
1，判斷網卡配置文件名稱為eth*或者是em* ，如dell服務器網卡CentOS5為eth*，而CentOS6為em*。
2，存在幾個網卡就復制幾個原網卡配置文件做為橋配置文件，n的設置的數量是
3，如果超過4網卡則設置更高值，原配置文件是DHCP的改為static，用.*匹配行是存在CentOS5和6參數有引號的問題。
4， 生成虛擬機橋借口br*並一一對應，如br0對應eth0，br1對應eth1等等，並重啟網絡。
#! /bin/sh
mypath="/etc/sysconfig/network-scripts"
for((n=0;n<=4;n++))
do
if [ -f "$mypath/ifcfg-eth$n" ]
then
sed -i "s/^ONBOOT.*/ONBOOT=yes/" $mypath/ifcfg-eth$n
sed -i "s/^BOOTPROTO.*/BOOTPROTO=static/" $mypath/ifcfg-eth$n
cp -a $mypath/ifcfg-eth$n $mypath/ifcfg-br$n
sed -i "/^HWADDR.*/d" $mypath/ifcfg-br$n
sed -i "s/^DEVICE.*/DEVICE=br"$n"/" $mypath/ifcfg-br$n
sed -i "s/^TYPE.*/TYPE=Bridge/" $mypath/ifcfg-br$n
echo "BRIDGE=br$n">>$mypath/ifcfg-eth$n
echo "The device br$n<---->eth$n is add success !"
else
echo "The device eth$n not exist!"
fi
if [ -f "$mypath/ifcfg-em$n" ]
then
sed -i "s/^ONBOOT.*/ONBOOT=yes/" $mypath/ifcfg-em$n
sed -i "s/^BOOTPROTO.*/BOOTPROTO=static/" $mypath/ifcfg-em$n
cp -a $mypath/ifcfg-em$n $mypath/ifcfg-br$n
sed -i "/^HWADDR.*/d" $mypath/ifcfg-br$n
sed -i "s/^DEVICE.*/DEVICE=br"$n"/" $mypath/ifcfg-br$n
sed -i "s/^TYPE.*/TYPE=Bridge/" $mypath/ifcfg-br$n
echo "BRIDGE=br$n">>$mypath/ifcfg-em$n
echo "The device br$n<---->em$n is add success !"
else
echo "The device em$n not exist!"
fi
done
/etc/init.d/network restart
更多CentOS相關信息見CentOS 專題頁面 http://www.linuxidc.com/topicnews.aspx?tid=14
