1.没有配内网IP的话

sed -i s#ONBOOT=no#ONBOOT=yes#g /etc/sysconfig/network-scripts/ifcfg-eth1 cat  >>/etc/sysconfig/network-scripts/ifcfg-eth1<<EOF IPADDR=192.168.20.157 NETMASK=255.255.255.0 EOF 2.如果配了，可以 A直接修改,省略 B利用sed替换，省略 C用脚本来替换 #!/bin/bash #qq:40594324 #version 1.0 #this script for change eth echo "press input eth0 or eth1" read A eth=$A IFCFG=/etc/sysconfig/network-scripts/ifcfg-${eth} ADDR=`ifconfig ${eth} |sed -ne 's/^.* inet addr:\([^ ]*\).*$/\1/gp'` MASK=`ifconfig ${eth} |sed -ne 's/^.* Mask:\([^ ]*\).*$/\1/gp'` echo "你要替换的地址是${eth} ${ADDR} ${MASK}" echo "you want change :" read  a b echo "替换后的地址为${eth} $a $b" echo "ok?no?" read c if [ "$c" == "ok"  ]     then                 cp ${IFCFG} ${IFCFG}.bak                 sed -i "s/$ADDR/$a/g" $IFCFG                 sed -i "s/$MASK/$b/g" $IFCFG echo "now: $eth $a $b "         fi