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Shell脚本一键刷入简单DHCP以及DNS服务（感兴趣的可进来看看）

一键刷入简单DHCP服务

本次脚本配置：所属服务器静态IP地址为：192.168.100.100（只有此点需要自定义）

#! /bin/bash
#一键自动DHCP

yum install dhcp -y 
wangka="/etc/sysconfig/network-scripts/ifcfg-ens33"
#配置文件位置

sed -i -e '/BOOTPROTO/s/dhcp/static/g' -e '/ONBOOT/aIPADDR=192.168.100.100\nNETMASK=255.255.255.0\nGATEWAY=192.168.100.1' $wangka
systemctl restart network
#修改静态IP地址

muban="/usr/share/doc/dhcp-4.2.5/dhcpd.conf.example"
peizhi="/etc/dhcp/dhcpd.conf"
[ ! -e "$peizhi.bak" ] && cp $peizhi $peizhi.bak
#判断配置文件是否存在备份，若没有，则进行备份

cp $muban $peizhi
sed -i '29asubnet 192.168.100.0  netmask 255.255.255.0 {\n range 192.168.100.120 192.168.100.150\;\n option routers 192.168.100.1\;\n}' $peizhi
systemctl start dhcpd
systemctl stop firewalld
setenforce 0
#开启服务，并关闭防火墙和增强性安全功能

一键刷入简单DNS正向解析服务

脚本配置：所属服务器IP地址：192.168.116.131

#!/bin/bash &>/dev/null
#一键DNS

rpm -q bind
if [ $? -ne 0 ];then
        yum install bind -y
        systemctl start named
fi
#DNS服务是否安装

read -p "自定义域名（实例：test.com）" yu
quanju="/etc/named.conf"
quyu="/etc/named.rfc1912.zones"
[ ! -e $quanju.bak ] && cp $quanju $quanju.bak
  sed -i -e '13s/127.0.0.1/192.168.116.131/' -e '21s/localhost/any/' $quanju 
[ ! -e $quyu.bak ] && cp $quyu $quyu.bak
#备份全局、区域配置文件

grep "$yu" $quyu &> /dev/null
while [ $? -ne 0 ];do
  sed -i "18azone \"$yu\" IN {\n  type master\;\n  file \"$yu.dns\"\;\n}\;\n" $quyu
  peizhi="/var/named/$yu.dns"
cp -p /var/named/named.localhost $peizhi
done
#判断域名是否存在，如果不存在进行添加

sed -i -e '2d' -e "1a@       IN SOA  "$yu"\. admin\."$yu"\. (" /var/named/$yu.dns
sed -i '8d' /var/named/$yu.dns
sed -i '$d' /var/named/$yu.dns
sed -i -e "7a\  NS  $yu." -e "/A/s/127.0.0.1/192.168.116.131/" /var/named/$yu.dns
#修改区域文件

while [ 1 -ge 0 ];do
    read -p "请输入自定义指针A记录（实例：www  IN A 8.8.8.8）" zhen
    echo $zhen >> /var/named/$yu.dns
    read -p "是否继续添加(y/n)" a
 if [ $a != "y" ];then
   break
fi
done
#循环

systemctl restart named
jieguo=`systemctl status named | grep "active" &>/dev/null`
if [ $? -eq 0 ];then
  echo "服务启动"
else
  echo "启动失败"
fi
#判断服务是否能正常启动

sed -i 's/116.2/116.131/g' /etc/resolv.conf
#用于自检

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