yum install dhcp tftp syslinux
vi /etc/xinetd.d/tftp
disable = no
service xinetd restart
chkconfig xinetd on
cp /usr/lib/syslinux/pxelinux.0 /tftpboot
cp /usr/lib/syslinux/menu.c32 /tftpboot
cp /usr/lib/syslinux/memdisk /tftpboot
cp /usr/lib/syslinux/mboot.c32 /tftpboot
cp /usr/lib/syslinux/chain.c32 /tftpboot
mkdir /tftpboot/pxelinux.cfg
vi /tftpboot/pxelinux.cfg/default