Automating the installation of DHCP services _shell

Experimental environment: VMWARE12, Redhat 6.4, support Chinese

#!/bin/bash
#shell自动搭建DHCP服务
Rpm-q DHCP &>/dev/null
If [$?-eq 0];then
echo "DHCP service has been built"
Else
echo "DHCP service is not set up, start building now"
Yum Install dhcp-y &>/dev/null
If [$?-eq 0];then
echo "DHCP service builds successfully"
Else
echo "Yum source error, Exit Now"
Exit 10
Fi
Fi
if [!-f/etc/dhcp/dhcpd.conf];then
echo "configuration file does not exist, other errors may occur, exit immediately"
Exit 20
Fi
Cat << EOF >/etc/dhcp/dhcpd.conf
Option Domain-name "server.org";
Option Domain-name-servers 114.114.114.114;

Default-lease-time 3200;
Max-lease-time 7200;

Subnet 192.168.16.0 netmask 255.255.255.0 {
Range 192.168.16.100 192.168.16.200;
Option routers 192.168.16.254;
}
Eof
Ifconfig eth0 192.168.16.254/24 &>/dev/null
If [$?-eq 0];then
Service DHCPD start &>/dev/null
If [$?-eq 0];then
echo "DHCP service turned on successfully"
Else
echo "DHCP service failed to open"
Fi
Else
echo "NIC IP configuration error, exit immediately"
Exit 30
Fi

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Automating the installation of DHCP services _shell