usage: ftp host-name [port]
ftp> ?Invalid command
ftp> ?Invalid command
ftp> ?Invalid command
ftp> ?Invalid command
ftp> ?Invalid command
ftp> ?Invalid command
ftp> ?Invalid command
ftp> ?Invalid command
ftp> ?Invalid command
ftp> ?Invalid command
ftp> 
ftp> 
ftp> 
ftp> 
ftp> 
ftp> ftp> ftp> 
ftp> ftp> 
ftp> ftp> ftp> 
ftp> ftp> 