传统bios引导-批量装机

1、yum install dhcp tftp-server httpd syslinux xinetd net-tools -y

2、编辑/etc/xinetd.d/tftp

　　service tftp
　　{
　　socket_type = dgram
　　protocol = udp
　　wait = yes
　　user = root
　　server = /usr/sbin/in.tftpd
　　server_args = -s /var/lib/tftpboot
　　disable = no （由yes改为no）
　　per_source = 11
　　cps = 100 2
　　flags = IPv4
　　}

 3、systemctl start xinetd && systemctl enable xinetd

 4、netstat -lantuep |grep 69

 5、cd /var/lib/tftpboot/

 6、ls

 7、cp /usr/share/syslinux/pxelinux.0 .

 8、mkdir pxelinux.cfg

 9、ls

　　pxelinux.0  pxelinux.cfg

 10、setenforce 0

 11、编辑/etc/selinux/config

　　# This file controls the state of SELinux on the system.
　　# SELINUX= can take one of these three values:
　　#     enforcing - SELinux security policy is enforced.
　　#     permissive - SELinux prints warnings instead of enforcing.
　　#     disabled - No SELinux policy is loaded.
　　SELINUX=disabled （由enforcing改为disabled）
　　# SELINUXTYPE= can take one of three values:
　　#     targeted - Targeted processes are protected,
　　#     minimum - Modification of targeted policy. Only selected processes are protected.
　　#     mls - Multi Level Security protection.
　　SELINUXTYPE=targeted
 12、systemctl stop firewalld && systemctl disable firewalld

 13、cp /usr/share/doc/dhcp*/dhcpd.conf.example /etc/dhcp/dhcpd.conf

 14、编辑/etc/dhcp/dhcpd.conf

　　subnet 172.16.190.0 netmask 255.255.255.0 {
　　  range 172.16.190.11 172.16.190.249;
　　  option routers 172.16.190.254;
　　  option broadcast-address 172.16.190.255;
　　  default-lease-time 600;
　　  max-lease-time 7200;
　　  filename "pxelinux.0";
　　  next-server 172.16.190.101;
　　}

 15、systemctl start dhcpd && systemctl disable dhcpd
 16、cp /mnt/images/pxeboot/* /var/lib/tftpboot/

 17、cp /mnt/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default

 18、编辑/var/lib/tftpboot/pxelinux.cfg/default 修改第1、61、64行，如下：

　　default centos76
　　label centos76
　　  menu label ^Install CentOS 7
　　  kernel vmlinuz
　　  append initrd=initrd.img ks=http://172.16.190.101/centos76.cfg
 19、mkdir /var/www/html/centos76

 20、编辑/etc/fstab

　　/root/CentOS-7.6-x86_64-Everything-1810.iso /var/www/html/centos76 iso9660 defaults 0 0

 21、systemctl start httpd && systemctl enable httpd

 22、chown apache:apache centos76.cfg && chown apache:apache ip.txt