shell基础之更改IP
要求：
显示所有网卡及其对应的IP地址，并可更改IP相关内容使其生效。
1 #!/bin/bash 2 #获取本机网卡和IP 3 while : 4 do 5 network=$(ifconfig |grep BROAD |awk -F: '{print $1}') 6 echo -e "本机网卡\tIP" 7 for single_network in $(echo $network);do 8 all_ip=$(ifconfig $single_network |grep -w "inet" |awk '{print $2}') 9 echo -e "$single_network\t\t$all_ip" 10 done 11 #获取要更改的网卡名称 12 while : 13 do 14 read -p "请输入要更改的网卡名称(默认退出)：" new_network 15 if [ -z $new_network ];then 16 echo "退出脚本" 17 exit 18 else 19 judge_new_network=`echo "$network" |grep -w "$new_network"` 20 if [ -z "$judge_new_network" ];then 21 echo "请输入正确的网卡名！" 22 else 23 break 24 fi 25 fi 26 done 27 #要更改的IP，掩码，网关 28 IPZZ="^([0-9]\.|[1-9][0-9]\.|1[0-9][0-9]\.|2[0-4][0-9]\.|25[0-5]\.){3}([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-4])$" 29 netmask_ZZ="^([0-9]\.|[1-9][0-9]\.|1[0-9][0-9]\.|2[0-4][0-9]\.|25[0-5]\.){3}([0-9]|[0-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$" 30 #输入新的IP地址 31 while : 32 do 33 read -p "请输入新的IP地址：" new_ip 34 if [ -z $new_ip ];then 35 echo "IP地址不能为空，请重新输入！" 36 elif [[ $new_ip =~ $IPZZ ]];then 37 break 38 else 39 echo "请输入正确的IP地址！" 40 fi 41 done 42 #输入掩码 43 while : 44 do 45 read -p "请输入新的掩码(默认为255.255.255.0)：" new_netmask 46 if [ -z $new_netmask ];then 47 new_netmask=255.255.255.0 48 break 49 elif [[ $new_netmask =~ $netmask_ZZ ]];then 50 break 51 else 52 echo "请输入正确的掩码！" 53 fi 54 done 55 #输入网关 56 while : 57 do 58 read -p "请输入新的网关：" new_gateway 59 if [ -z $new_gateway ];then 60 echo "网关不能为空，请重新输入！" 61 elif [[ $new_gateway =~ $IPZZ ]];then 62 break 63 else 64 echo "请输入正确的网关！" 65 fi 66 done 67 #写入配置文件 68 echo "NAME=$new_network 69 DEVICE=$new_network 70 ONBOOT=yes 71 BOOTPROTO=none 72 IPADDR=$new_ip 73 NETMASK=$new_netmask 74 GATEWAY=$new_gateway 75 DNS1=114.114.114.114 76 DNS2=8.8.8.8" > /etc/sysconfig/network-scripts/ifcfg-$new_network 77 #重启服务 78 systemctl restart network 79 done
