- LIST — List contents of the supplied directory (or user’s FTP root)
- PASS — Specify the password for the account logging on
- PASV — Switch to passive mode
- QUIT — End the current session/connection
- RETR — Retrieve the provided file
- STAT — Provide connection/server information
- SYST — Provide system “type” information
- TYPE — Switch between ASCII (A) and binary (I) transfer modes
- USER — Specify the username for the account logging on
There are a lot more obscure commands as well, though the above is sufficient for basic operations.