实验环境：
CentOS 6.4
IP:10.0.0.104/24
Gateway:10.0.0.1
DNS:10.0.0.205
步骤：
yum -y install syslinux dhcp tftp-server nfs-utils
DHCP:
vim /etc/dhcp/dhcpd.conf
ddns-update-style interim;
ignore client-updates;
subnet 10.0.0.0 netmask 255.255.255.0 {
option routers 10.0.0.1;
option subnet-mask 255.255.255.0;
option domain-name-servers 10.0.0.205;
option time-offset -18000;
range dynamic-bootp 10.0.0.110 10.0.0.120;
default-lease-time 21600;
max-lease-time 43200;
filename "pxelinux.0";
next-server 10.0.0.104;
}
service dhcpd start
TFTP-Server
vim /etc/xinetd.d/tftp
disable = yes 改为no
chkconfig tftp on
/etc/init.d/xinetd start
挂载CentOS安装光盘（1/2）
mount /dev/cdrom /media
cp /media/isolinux/* /var/lib/tftpboot
cd /var/lib/tftpboot
mkdir pxelinux.cfg
cp *.msg pxelinux.cfg/
cp isolinux.cfg pxelinux.cfg/
mv isolinux.cfg pxelinux.cfg/default
cp /usr/share/syslinux/pxelinux.0 ./
mkdir -p /var/www/html/centos/6.4/x86_64
cp -r /media/* /var/www/html/centos/6.4/x86_64
cp ~/ks.cfg /var/www/html/centos/ (ks.cfg文件之前准备好的，如果没有的话提前配置)
chmod a+x /var/www/html/centos/
/uar/local/apache2/bin/apachectl start
vim /var/lib/tftpboot/pxelinux.cfg/default
prompt 1（去掉#号）
timeout 10(值修改小一点)
label linux
menu label ^Install or upgrade an existing system
menu default
kernel vmlinuz
append ks=http://10.0.0.104/centos/ks.cfg initrd=initrd.img \\修改这句
NFS：
vim /etc/exports
/var/www/html/centos 10.0.0.0/24(ro)
service rpcbind start
service nfs start
服务端设置完成，设置客户端从网卡启动