#!/bin/bashcd /etc/network#清除4-9行sed -i '4,9d' interfaces#在第3行添加网卡名称sed -i "3a auto ${1}" interfaces#在第4行添加sed -i "4a iface ${1} inet static" interfaces#在第5行添加IPsed -i "5a address ${2}" interfaces#在第6行添加子网掩码sed -i "6a netmask ${3}" interfaces#在第7行添加网关sed -i "7a gateway ${4}" interfaces#在第8行添加DNSif test -z "${5}"then  sed -i "8a dns-nameservers 0.0.0.0" interfaceselse   sed -i "8a dns-nameservers ${5}" interfacesfiecho "chang is succes"