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This is the command jdresolve that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



jdresolve - resolves IP addresses into hostnames


jdresolve [-h] [-v] [-n] [-r] [-a] [-d <level>] [-m <mask>] [-l <line
cache>] [-t <timeout>] [-p] [-s <number of sockets>] [--database=<db path>]

jdresolve [--help] [--version] [--nostats] [--recursive] [--anywhere]
[--debug=<level>] [--mask=<mask>] [--linecache=<line cache>]
[--timeout=<timeout>] [--sockets=<number of sockets>] [--database=<db path>]
[--dbfirst] [--dbonly] [--dumpdb] [--mergedb] [--expiredb=<hours>]
[--unresolved] [--progress] <LOG FILE>


jdresolve resolves IP addresses to hostnames. Any file format is supported,
including those where the line does not begin with the IP address. One of the
strongest features of the program is the support for recursion, which can
drastically reduce the number of unresolved hosts by faking a hostname based on the
network that the IP belongs to. DNS queries are sent in parallel, which means that
you can decrease run time by increasing the number of simultaneous sockets used (given
a fast enough machine and available bandwidth ). By using the database support,
performance can be increased even further, by using cached data from previous runs.


-h, --help
produces a short help message

-v, --version
display version information

-n, --nostats
don't display stats after processing

-r, --recursive
recurse into C, B and A classes when there is no PTR (default is no recursion)

-d, --debug=<debug-level>
debug mode - no file output, just statistics during run (verbosity level
range: 1-3)

-t, --timeout=<seconds>
timeout in seconds for each host resolution (default is 30 seconds)

-l, --line-cache=<lines>
numbers of lines to cache in memory (default is 10000

-s, --sockets=<sockets>
maximum number of concurrent sockets (use ulimit -a to check the max allowed
for your operating system - defaults to 64)

-m, --mask=<mask>
<mask> accepts %i for IP and %c for class owner, e.g. "somewhere.in.%c" or
"%i.in.%c" (default is "%i.%c")

-a, --anywhere
resolves IPs found anywhere on a line (will resolve all IPs if there is
more than one)

-p, --progress
prints a nice progress bar indicating the status of the resolve operations

--database=<db path>
path to database that holds resolved hosts/classes

check if we have resolved entries in the database before sending out DNS queries

don't send DNS queries, use only resolved data in the database

dumps a database to STDOUT

merges resolved IP/classes from a file (or STDIN) with a database

expires entries in the database that are older than <hours> hours

won't attempt to resolve IPs, only lists those that were not resolved

the log filename or '-' for STDIN


jdresolve access_log > resolved_log
jdresolve -r -s 128 access_log > resolved_log
jdresolve -r --database hosts.db access_log > res_log

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