. `vim dvd.repo
	[development]         #定義后期選包
	name=centos
	baseurl=file:///media
	gpgcheck=0
	enabled=1`

cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example /etc/dhcp/dhcpd.conf   #拷貝模板，覆蓋掉conf文件

vim   /etc/dhcp/dhcpd.conf    #全局配置和子配置二選一，
   全局配置 # option definitions common to all supported networks...
  7 option domain-name "example.org";
  8 option domain-name-servers ns1.example.org, ns2.example.org;
  9 
 10 default-lease-time 600;
 11 max-lease-time 7200;
 12 next-server 192.168.100.10;   #指定tftpserver在哪里
 13 filename "/pxelinux.0";     #網(wǎng)絡(luò)引導(dǎo)程序文件

 #  子配置  A slightly different configuration for an internal subnet.
 47 #子網(wǎng)配置
 48 subnet 192.168.100.0 netmask 255.255.255.0 {
 49   range 192.168.100.11 192.168.100.30;       #DHCP地址池的范圍
 50   option domain-name-servers 192.168.100.2;  #DNS地址   （可以設(shè)置）
 51   option domain-name "example.com"; #域名地址
 52   option routers 192.168.100.1;     #網(wǎng)關(guān)地址
 53   option broadcast-address 192.168.100.255;  #廣播地址
 54   default-lease-time 600;      #租約期  獲取到的ip存活多長時間
 55   max-lease-time 7200;  #租約期到期，在的話就還可以用，不在自動回收
 56 }

[root@pxeserver ~]# vim /etc/xinetd.d/tftp 

# default: off
# description: The tftp server serves files using the trivial file transfer \
#       protocol.  The tftp protocol is often used to boot diskless \
#       workstations, download configuration files to network-aware printers, \
#       and to start the installation process for some operating systems.
service tftp
{
        socket_type             = dgram
        protocol                = udp
        wait                    = yes
        user                    = root
        server                  = /usr/sbin/in.tftpd
        server_args             = -s /var/lib/tftpboot
        disable                 = no     ##yes修改為no
        per_source              = 11
        cps                     = 100 2
        flags                   = IPv4
}

yum provides "*/pxelinux.0"     ##查找此文件屬于那個軟件包
yum install -y syslinux         #安裝syslinux
cp /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/    #復(fù)制pxelinux.0文件到tftp根目錄下面
mkdir -p /var/lib/tftpboot/pxelinux.cfg      #安放default配置文件
cp /media/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default    ##開機文件cp到pxeLinux.cfg目錄下
cp /media/isolinux/* /var/lib/tftpboot/        #cp安放iso文件，default來讀取（安裝菜單會顯示）
此時還沒有系統(tǒng)
配置default文件
menu separator # insert an empty line
menu separator # insert an empty line
 
label linux
  menu label ^Install CentOS 7.5   #菜單目錄
  kernel vmlinuz      #內(nèi)核文件
  append initrd=initrd.img ks=http://192.168.100.10/ks/ks.cfg

yum install -y httpd
systemctl start httpd
systemctl enable httpd
mkdir -p /var/www/html/centos
cp -rfv /media/* /var/www/html/centos/
[root@pxe-server ~]# cat /etc/yum.repos.d/dvd.repo 
[development]         #定義后期選包
name=centos
baseurl=http://192.168.100.10/centos
gpgcheck=0
enabled=1

yum install -y system-config-kickstart
system-config-kickstart      #啟動