1、tftp安装
2、见如下地址
http://jingyan.baidu.com/article/6079ad0e80c99b28ff86dbdd.html
service tftp
{
socket_type = dgram
protocol = udp
wait = yes
user = root
server = /usr/sbin/in.tftpd
server_args = -s /tftpboot
disable = no
per_source = 11
cps = 100 2
flags = IPv4
}