sftp_srv <service>
sftp_srv 55555
sftp_clt <address> <service>
sftp_clt 0.0.0.0 55555
help : display all commands.
quit : close the connection and leave.
exit : close the connection and leave.
get <src> <dst> : Retrieve a file from server.
put <src> <dst> : Transfer a file to the server.
ls <dir> : Display a distant directory.