How to write a script to install the Configure DHCP service

Requirements:

1, automatic installation, basic configuration

2, through the prompt input network segment, subnet mask, gateway, DNS, IP end address and other information to complete the scope of the add

"Method One":

#!/bin/bash

conf= "/etc/dhcpd.conf"

Rpm-q DHCP &>/dev/null

If [$?-ne 0];then

Yum-y Install DHCP

Fi

grep "Subnet" $conf &>/dev/null

If [$?-ne 0]; Then

echo "

Ddns-update-style Interim;

Ignore client-updates;

Default-lease-time 21600;

Max-lease-time 43200;

"> $conf

Fi

Read-p "Please input network:" Network

Read-p "Please input netmask:" Netmask

Read-p "Please input gateway:" Gateway

Read-p "Please input DNS:" DNS

Read-p "Please input start_ip:" Start_ip

Read-p "Please input end_ip:" End_ip

echo "

Subnet $network netmask $netmask {

option routers $gateway;

Option Subnet-mask $netmask;

URL Address: http://www.bianceng.cn/Servers/zs/201602/49614.htm

Option Domain-name-servers $dns;

Range DYNAMIC-BOOTP $start _ip $end _ip;

}

">> $conf

Service DHCPD Restart

"Method Two":

#!/bin/bash

Dhcpconf=/etc/dhcpd.conf

Rpm-q DHCP &>/dev/null

If [$?-ne 0];then

Yum-y Install DHCP

Fi

grep "Subnet" $dhcpconf &>/dev/null

If [$?-ne 0];then

echo "Ddns-update-style interim;

Ignore client-updates;

Default-lease-time 21600;

Max-lease-time 43200; "> $dhcpconf

Fi

While True

Todo

Read-p "Please input network:" Network

Read-p "Please input Netmask:" Netmask

Read-p "Please input gateway:" Gateway

Read-p "Please input DNS:" DNS

Read-p "Please input start_ip:" Start_ip

Read-p "Please input end_ip:" End_ip

grep $network $dhcpconf &>/dev/null

If [$?-ne 0];then

echo "Subnet $network netmask $netmask {

option routers $gateway;

Option Subnet-mask $netmask;

Option Domain-name-servers $dns;

Range DYNAMIC-BOOTP $start _ip $end _ip;

} ">> $dhcpconf

Read-p "continue to Do" (yes/no) yn

if [$yn = "no"]; Then

Service DHCPD Status &>/dev/null

If [$?-ne 0]; Then

Service DHCPD start &>/dev/null

Else

Service DHCPD Reload &>/dev/null

Fi

Exit 0

Fi

Fi

Done

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