TFTP Trivial File Transfer Protocol

service tftp
{
disable = no
#預設disable = yes，設成no才服務
socket_type = dgram
protocol = udp
wait = yes
user = root
server = /usr/sbin/in.tftpd
server_args = -c -s /tftpboot
#預設只有 server_args = -s /tftproot 但要 -c 才可Allow new files to be created.(見man tftpd)
per_source = 11
cps = 100 2
}

#chmod 777 /tftproot
將tftp directory 之權限改為777，才能讓anybody讀寫此directory。

OPTIONS
-l Run the server in standalone (listen) mode, rather than run from
inetd. In listen mode, the -t option is ignored, and the -a
option can be used to specify a specific local address or port
to listen to.

-a [address][:port]
Specify a specific address and port to listen to when called
with the -l option. The default is to listen to the tftp port
specified in /etc/services on all local addresses.

-c Allow new files to be created. By default, tftpd will only
allow upload of files that already exist. Files are created
with default permissions allowing anyone to read or write them,
unless the -p or -U options are specified.

-s Change root directory on startup. This means the remote host
does not need to pass along the directory as part of the trans-
fer, and may add security. When -s is specified, exactly one
directory should be specified on the command line. The use of
this option is recommended for security as well as compatibility
with some boot ROMs which cannot be easily made to include a
directory name in its request.

/etc/init.d/xinetd restart

TFTP [-i] host [GET | PUT] source [destination]

D:>tftp hostname put 1.txt
將本機上的1.txt放在hostname上的tftp directory。

D:>tftp hostname get 1.txt
將hostname上的tftp directory中之1.txt取回本機。