ABOR- stop file transfer.
CWD- change the current (active) directory.
DELE- delete a file.
LIST- display a list of server files.
MDTM- display the file modification time.
MKD- create a directory.
NLST- display a list of directory files (more concise than
LIST). The list is transmitted over the data connection (port
PASS- pass the password.
PASV- switch to passive mode.
PORT- enter the active mode and specify the ports that will be used for data transmission.
PWD- display the active directory.
QUIT- disconnect, terminate the connection.
RETR- Download file.
RMD- delete a folder on the server.
RNTO- rename the file. Used as:
RNFR initial_renamed RNTO file_file.
SIZE- return the file size.
STOR- upload the file to the server.
TYPE- set the file transfer type (binary, ASCII (text)).
USER- send username.
APPE- add to a file on the server.
CDUP- go to the parent directory. Similar to the team
HELP- displaying text information of help on working with the server.
NOOP- do nothing (dummy command).
STAT- display the current status of the connection with the server.
STOU- upload unique files to the server. In this case, files with similar names are not transferred.
STRU- establish the file transfer structure.
SYST- display information about the system (server).
PBSZ- set the size of the protected buffer.
OPTS- a command that calls another optional command with a pre-specified parameter. More details in RFC.
AUTH- start authorization and encryption operation.