ftp commands, responses

Sample commands:

• sent as ASCII text over control channel

• USER username

• PASS password

• LIST return list of file in current directory

• RETR filename retrieves (gets) file

• STOR filename stores (puts) file onto remote host

Sample return codes

• status code and phrase (as in http)

• 331 Username OK, password required

• 125 data connection already open; transfer starting

• 425 Can’t open data connection

• 452 Error writing file

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