shell 获取网关 以及修改ip 启用网卡

#!/bin/bash
#autho freefei
#script is a init computer eth
#data 2014 10 09  192.168.1.1

netstats=$(netstat -r|grep default|cut -f 10 -d ‘ ‘);
echo $netstats;

#change other ifcfg

eth1Path=/etc/sysconfig/network-scripts/ifcfg-eth1
newip=$(echo ${netstats} |cut -f 1-3 -d .) #获取网关前面三段 不包含当前电脑ip
comnewid=‘IPADDR=‘${newip}.252

sedstatu=$(sed  -r -i "/GATEWAY=/ s/.*/GATEWAY=${netstats}/g" ${eth1Path});

#组合新的ip
sedstatu=$(sed  -r -i "/IPADDR=/ s/.*/${comnewid}/g" ${eth1Path});

# so close default eth0 and ifup new eth1

if $sedstatu -eq 0
then
       # ifdown eth0
       # ifup eth1
        service network restart
else
        echo ‘sorry sed connond its error ‘
fi
exit 0