The following commands are recognized:            
   USER   PORT   TYPE   STOR   ALLO   PWD    LIST 
   PASS   PASV   MODE   STOU   RNTO   CDUP   NLST 
   SYST   ABOR   STRU   RETR   RNFR   CWD    NOOP 
   HELP   STAT   SIZE   APPE          MKD         
   QUIT          MDTM   DELE          RMD