debug - Enable/disable DEBUG output

DEBUG output is primarily used by network administrators and support staff to diagnose problems on the network. Users do not usually require DEBUG output.

debug

<debug-value>

<debug-value>

Values in the range 0 through 9 are permitted.

0 1	No DEBUG output All messages from the FTP client to the FTP server and from the FTP server to the FTP client are output. In addition to 1:
2	Information on file access is output.

If no operand is specified, the DEBUG output switch is toggled, i.e. if the DEBUG output was enabled, it is now disabled, and if it was disabled, it is now enabled. Values greater than 2 are treated in the same way as 2.