shell实现将动态ip修改为静态ip，静态ip修改为其它静态ip

shell实现将动态ip修改为静态ip，静态ip修改为其它静态ip
（1）将动态ip修改为静态ip的思路
   ① 修改ip之前，先备份ifcfg-eth0文件
   ② 进入网卡配置目录 /etc/sysconfig/network-scripts/ifcfg-eth0
   ③ 修改BOOTPROTO=static
   ④ 修改ONBOOT=yes
   ⑤ 配置静态ip地址 IPADDR
   ⑥ 配置DNS NETMASK
   ⑦ 配置网关 GATEWAY
   ⑧ 重启网卡验证配置，验证配置结果   service   network restart
（2）将静态ip修改为其它静态ip的思路
   ☆ 先判断是否是静态ip   grep "dhcp" /etc/sysconfig/network-scripts/ifcfg-eth0/
   ☆
         if[$? -ne   0]; then
            sed -i `s/^IPADDR/#IPADDR/g` ifcfg-eth0
            read -p   "please Enter ip:"IPADDR
            echo "IPADDR="$IPADDR">>/etc/sysconfig/network-scripts/
         fi
☆ 重启网卡验证配置结果   service network restart
代码示例：

#!/bin/bash
#2018年08月14日
#change ip shell
NET_FILE="/etc/sysconfig/network-scripts"
NET_DIR="ifcfg-eth0"
cd $NET_FILE/
#change ip static for static:
grep "dhcp" $NET_DIR
if [ $? -ne 0 ];then
sed -i s/^IPADDR/#IPADDR/g $NET_DIR
read -p "Please enter ip Address,example 192.168.0.11 ip:" IPADDR
echo "IPADDR=$IPADDR">>$NET_DIR
echo "NETMASK=255.255.255.0">>$NET_DIR
echo "GATEWAY=192.168.2.254">>$NET_DIR
service network restart
else

#change ip dhcp for static
sed -i s/dhcp/static/g $NET_DIR
sed -i s/ONBOOT=no/ONBOOT=yes/g $NET_DIR
read -p "Please enter ip Address,example 192.168.0.11 ip:" IPADDR
cat>>$NET_FILE/$NET_DIR <<EOF
IPADDR=$IPADDR
NETMASK=255.255.255.0
GATEWAY=192.168.2.1
EOF
service network restart
fi

或者

#!/bin/bash
#by author daqi
#change ip shell
NET_FILE="/etc/sysconfig/network-scripts"
NET_DIR="ifcfg-eth0"
cd $NET_FILE/
#change ip static for static:
grep "dhcp" $NET_DIR
if [ $? -ne 0 ];then
sed -i s/^IPADDR/#IPADDR/g $NET_DIR
#read -p "Please enter ip Address,example 192.168.0.11 ip:" IPADDR
echo "IPADDR=$10.30.8.80">>$NET_DIR
echo "NETMASK=255.255.255.0">>$NET_DIR
echo "GATEWAY=192.168.2.254">>$NET_DIR
service network restart
else
#change ip dhcp for static
sed -i s/dhcp/static/g $NET_DIR
sed -i s/ONBOOT=no/ONBOOT=yes/g $NET_DIR
read -p "Please enter ip Address,example 192.168.0.11 ip:" IPADDR
cat>>$NET_FILE/$NET_DIR <<EOF
IPADDR=$IPADDR
NETMASK=255.255.255.0
GATEWAY=192.168.2.1
EOF
service network restart
fi

自动配IP脚本

#!/bin/bash
#自动配IP
# Author: tianzhaogao （E-mail: [email protected]）

line_num=$(cat /etc/sysconfig/network-scripts/ifcfg-eth0 | wc -l)

while [ "$line_num" -gt 7 ]
    do
        sed -i '8c \' /etc/sysconfig/network-scripts/ifcfg-eth0
        line_num=$(cat /etc/sysconfig/network-scripts/ifcfg-eth0 | wc -l)
    done

read -t 30 -p "Please input IP:" ipnum

n1=$(echo "$ipnum" | cut -d "." -f 1)
n2=$(echo "$ipnum" | cut -d "." -f 2)
n3=$(echo "$ipnum" | cut -d "." -f 3)
n4=$(echo "$ipnum" | cut -d "." -f 4)

if [ "$n1" -le 255 -a "$n2" -le 255 -a "$n3" -le 255 -a "$n4" -le 255 ];then
    echo -e IPADDR="$ipnum""\n"NETMASK=255.255.255.0"\n"GETWAY="$n1"\."$n2"\."$n3"\.1"\n"IPV6INIT=no"\n"USERCTL=no >> /etc/sysconfig/network-scripts/ifcfg-eth0
    sed -i 's/ONBOOT="no"/ONBOOT="yes"/g' /etc/sysconfig/network-scripts/ifcfg-eth0
    sed -i 's/BOOTPROTO=dhcp/BOOTPROTO=none/g' /etc/sysconfig/network-scripts/ifcfg-eth0
    sed -i 's/ONBOOT=no/ONBOOT=yes/g' /etc/sysconfig/network-scripts/ifcfg-eth0
    service network restart
fi

shell实现将动态ip修改为静态ip，静态ip修改为其它静态ip

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