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#########################packags needed###################################
need packages：
system-config-kickstart ##自动应答脚本制作工具
syslinux ##获得pxelinux.0文件安装包
dhcp ##分配ip给客户机的服务
tftp-server ##提供tftp协议的服务
httpd ##安装源共享服务
#########################config file rules#####################################
No.1 FIST CONFIG DHCP ##配置dhcp配置文件
config /etc/dhcpd/dhcpd.conf like this:
===============================================================
option domain-name "example.com"; ##域名
option domain-name-servers 192.168.0.79; ##dns
default-lease-time 600; ##默认租约期
max-lease-time 7200; ##最长租约期
log-facility local7; ##日志级别
subnet 192.168.0.0 netmask 255.255.255.0 { ##网段，子网掩码
range 192.168.0.102 192.168.0.111; ##地址范围
option routers 192.168.0.254; ##网关
filename "pxelinux.0"; ##pxe启动程序
next-server 192.168.0.79; ##tftp主机地址
}
systemctl restart dhcpd
systemctl stop firewalld
No.2 SED CONFIG TFTP
config /etc/xinetd.d/tftp like this:
service tftp
{
socket_type = dgram
protocol = udp
wait = yes
user = root
server = /usr/sbin/in.tftpd
server_args = -s /var/lib/tftpboot
disable = |