下面由centos教程栏目给大家介绍Centos8基于PXE自动安装操作系统，希望对需要的朋友有所帮助！

PXE服务器配置

安装相关软件

1	`dnf install -y httpd tftp-server dhcp-server syslinux-nonlinux`

配置 dhcp

vim /etc/dhcp/dhcpd.conf
subnet 192.168.43.0 netmask 255.255.255.0 {
range 192.168.43.100 192.168.43.200;
option routers 192.168.43.2;
option domain-name "xuepeng.com";
option domain-name-servers 180.76.76.76, 114.114.114.114;
next-server 192.168.43.8;
filename "pxelinux.0";
}

立即启动，开机自启动服务

1	`systemctl enable --now tftp dhcpd httpd`

准备相关目录挂载光盘

提前添加三张光驱，分别放入centos6,7,8的光盘

mkdir -p /var/www/html/Centos/{6,7,8}/os/x86_64
mount /dev/sr0 /var/www/html/Centos/8/os/x86_64/
mount /dev/sr1 /var/www/html/Centos/6/os/x86_64/
mount /dev/sr2 /var/www/html/Centos/7/os/x86_64/

将ks文件移动到 /var/www/html/ksdir

Centos6，7，8 ks.cfg

1 2	`mkdir` `/var/www/html/ksdir` `mv ks{6,7,8}.cfg /var/www/html/ksdir`

准备启动相关文件放到 /var/lib/tftpboot 目录下

initre.img , vmlinuz 来自光盘
menu.c32， pxelinux.0 来自 syslinux-nonlinux 软件包
ldlinux.c32 ， libcom32.c32，libutil.c32 来自 centos8的光盘
pxelinux.cfg 自己创建的目录

/var/lib/tftpboot/pxelinux.cfg/default文件内容

default menu.c32
timeout 600
menu title PXE Auto Install Centos
 
 
label mini 6
  menu label ^Install CentOS Mini ^6
  kernel Centos6/vmlinuz
  append initrd=Centos6/initrd.img ks=http://192.168.43.8/ksdir/ks6.cfg
 
 
label mini 7
  menu label ^Install CentOS Mini ^7
  kernel Centos7/vmlinuz
  append initrd=Centos7/initrd.img ks=http://192.168.43.8/ksdir/ks7.cfg
 
label mini 8
  menu label ^Install CentOS Mini ^8
  kernel Centos8/vmlinuz
  append initrd=Centos8/initrd.img ks=http://192.168.43.8/ksdir/ks8.cfg
 
 
label manual
  menu label ^Manual Install Centos Linux 8
  kernel Centos8/vmlinuz
  append initrd=Centos8/initrd.img inst.repo=http://192.168.43.8/Centos/8/os/x86_64
 
label rescue
  menu label ^Rescue a CentOS Linux system 8
  kernel Centos8/vmlinuz
  append initrd=Centos8/initrd.img ks=http://192.168.43.8/ksdir/ks8.cfg rescue quiet
 
label rescue
  menu label ^Rescue a CentOS Linux system 7
  kernel Centos7/vmlinuz
  append initrd=Centos7/initrd.img ks=http://192.168.43.8/ksdir/ks7.cfg rescue quiet
 
 
label rescue
  menu label ^Rescue a CentOS Linux system 6
  kernel Centos6/vmlinuz
  append initrd=Centos6/initrd.img ks=http://192.168.43.8/ksdir/ks6.cfg rescue quiet
 
label local
  menu default
  menu label Boot from ^local drive
  localboot 0xffff