220 reply codes
220: command terminated due to server shutdown in progress
220: Connection will close if idle for more than timeout
220: Connection will not timeout.
220-: FTP init_time on init_date.
220-: jobname IBM FTP version_release at hostname, init_time on init_date.
220: Reinitialized; Ready for new user.
220-: The message was truncated.
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FTPD reply codes