Centos6/7来网络引导（pxe）安装centos

在网上也找了很多教程然后综合一下

1、需要安装的程序

tftp-server、dhcp、syslinux

2、安装和配置程序

yum install dhcp tftp-server syslinux

简单配置一下dhcp，vim /etc/dhcp/dhcp.c

option domain-name "example.org";

option domain-name-servers 61.139.2.69;
default-lease-time 600;
max-lease-time 7200;

# Use this to enble / disable dynamic dns updates globally.
#ddns-update-style none;

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
#authoritative;

# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
log-facility local7;

# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.
#subnet 172.20.128.0 netmask 255.255.255.0{
#    range 172.20.128.200 172.20.128.220;
#    option routers 172.20.128.1;
#    netxt-server 172.20.28.1;
#    filename "pxelinux.0";
#}
subnet 192.168.139.0 netmask 255.255.255.0{
range 192.168.139.200 192.168.139.220;
option routers 192.168.139.208;
#next-server 192.168.139.208;
filename "centos/6/isolinux/pxelinux.0";
}

注意：1、因为我的tftp也在本机所以next-server可以注释，filename是tftp的根目录到pxelinux.0。

2、注意网段，如果你的局域网有dhcp我建议以就设置在同一个网段

配置tftp，vim /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
per_source              = 11
cps                     = 100 2
flags                   = IPv4
}

注意：1、disable =no

拷贝文件到tftp中去

挂载光盘：mount /dev/cdrom /mnt

拷贝文件：cp /mnt/isolinux/* /var/lib/tftpboot/centos/6/isolinux/

cp /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/centos/6/isolinux/

创建一个目录mkdir /var/lib/tftpboot/centos/6/isolinux/pxelinux.cfg

拷贝配置:cp /var/lib/tftpboot/centos/6/isolinux/isolinux.cfg /var/lib/tftpboot/centos/6/isolinux/pxelinux.cfg/default

注意：1、centos/6/isolinux是我自己创建的目录

启动服务

1、centos6

service dhcpd restart

service tftp restart

2、centos7

systemctl restart dhcpd

systemctl restart tftp

注意：1、手动打的字如果有错，请提一下，我可以修改。谢谢