More detailed documetation of each verbosity level

[Peng Yu <pengyu.ut () gmail com>]

Hi,

The man page does not clearly document what each verbosity level
exactly entails. Could anybody explain what additional info are shown
at each higher verbosity level? How many levels are in total? Thanks.

       -v (Increase verbosity level), -vlevel (Set verbosity level)
           Increases the verbosity level, causing Nmap to print more
           information about the scan in progress. Open ports are shown as
           they are found and completion time estimates are provided when Nmap
           thinks a scan will take more than a few minutes. Use it twice or
           more for even greater verbosity: -vv, or give a verbosity level
           directly, for example -v3.

           Most changes only affect interactive output, and some also affect
           normal and script kiddie output. The other output types are meant
           to be processed by machines, so Nmap can give substantial detail by
           default in those formats without fatiguing a human user. However,
           there are a few changes in other modes where output size can be
           reduced substantially by omitting some detail. For example, a
           comment line in the grepable output that provides a list of all
           ports scanned is only printed in verbose mode because it can be
           quite long.

-- 
Regards,
Peng
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