NAME

     gnunet-download — a command line interface for downloading files from GNUnet

SYNOPSIS

     gnunet-download [-a LEVEL | --anonymity=LEVEL] [-c FILENAME | --config=FILENAME]
                     [-D | --delete-incomplete] [-h | --help] [-L LOGLEVEL | --loglevel=LOGLEVEL]
                     [-n | --no-network] [-o FILENAME | --output=FILENAME]
                     [-p DOWNLOADS | --parallelism=DOWNLOADS]
                     [-r REQUESTS | --request-parallelism=REQUESTS] [-R | --recursive]
                     [-v | --version] [-V | --verbose] ⟨GNUNET_URI⟩

DESCRIPTION

     Download files from GNUnet.  The options are as follows:

     -a LEVEL | --anonymity=LEVEL
             This option can be used to specify additional anonymity constraints.  The default is
             1.  If set to 0, GNUnet will publish the file non-anonymously and in fact sign the
             advertisement for the file using your peer's private key.  This will allow other
             users to download the file as fast as possible, including using non-anonymous
             methods (discovery via DHT and CADET transfer).  If you set it to 1 (default), you
             use the standard anonymous routing algorithm (which does not explicitly leak your
             identity).  However, a powerful adversary may still be able to perform traffic
             analysis (statistics) to over time discovery your identity.  You can gain better
             privacy by specifying a higher level of anonymity (using values above 1).  This
             tells FS that it must hide your own requests in equivalent-looking cover traffic.
             This should confound an adversaries traffic analysis, increasing the time and effort
             it would take to discover your identity.  However, it also can significantly reduce
             performance, as your requests will be delayed until sufficient cover traffic is
             available.  The specific numeric value (for anonymity levels above 1) is simple:
             Given an anonymity level L (above 1), each request FS makes on your behalf must be
             hidden in L-1 equivalent requests of cover traffic (traffic your peer routes for
             others) in the same time-period.  The time-period is twice the average delay by
             which GNUnet artificially delays traffic.  Note that regardless of the anonymity
             level you choose, peers that cache content in the network always use anonymity level
             1.

     -c FILENAME | --config=FILENAME
             Use config file (default: ~/.config/gnunet.conf)

     -D | --delete-incomplete
             Causes gnunet-download to delete incomplete downloads when aborted with CTRL-C.
             Note that complete files that are part of an incomplete recursive download will not
             be deleted even with this option.  Without this option, terminating gnunet-download
             with a signal will cause incomplete downloads to stay on disk.  If gnunet-download
             runs to (normal) completion finishing the download, this option has no effect.

     -h | --help
             Print the help page.

     -L LOGLEVEL | --loglevel=LOGLEVEL
             Change the loglevel.  Possible values for LOGLEVEL are ERROR, WARNING, INFO and
             DEBUG.

     -n | --no-network
             Only search locally, do not forward requests to other peers.

     -o FILENAME | --output=FILENAME
             Write the file to FILENAME.  Hint: when recursively downloading a directory, append
             a '/' to the end of the FILENAME to create a directory of that name.  If no FILENAME
             is specified, gnunet-download constructs a temporary ID from the URI of the file.
             The final filename is constructed based on meta-data extracted using libextractor(1)
             (if available).

     -p DOWNLOADS | --parallelism=DOWNLOADS
             Set the maximum number of allowed parallel downloads to DOWNLOADS.  More parallel
             downloads can, to some extent, improve the overall time to download content.
             However, parallel downloads also take more memory (see also -r which can be used to
             limit memory utilization) and more sockets.  This option is used to limit the number
             of files that are downloaded in parallel.  -r can be used to limit the number of
             blocks that are concurrently requested.  As a result, the value only matters for
             recursive downloads.  The default value is 32.

     -r REQUESTS | --request-parallelism=REQUESTS
             Set the maximum number of parallel requests that is allowed.  If multiple files are
             downloaded, gnunet-download will not run them in parallel if this would cause the
             number of pending requests to possibly exceed the given value.  This is useful
             since, for example, downloading dozens of multi-gigabyte files in parallel could
             exhaust memory resources and would hardly improve performance.  Note that the limit
             only applies to this specific process and that other download activities by other
             processes are not included in this limit.  Consider raising this limit for large
             recursive downloads with many large files if memory and network bandwidth are not
             fully utilized and if the parallelism limit (-p) is not reached.  This option also
             only matters for recursive downloads.  The default value is 4092.

     -R | --recursive
             Download directories recursively (and in parallel).  Note that the URI must belong
             to a GNUnet directory and that the filename given to -o must end in '.gnd' —
             otherwise, you will receive an error.  You may want to use "DIRNAME/.gnd" for the
             filename, this way a directory "DIRNAME/" will be created, and GNUnet's internal
             directory information will be stored in "DIRNAME/.gnd".  However, it is also
             possible to specify "DIRNAME.gnd", in which case the files from the directory will
             end up in "DIRNAME/", while GNUnet's directory meta data will be in "DIRNAME.gnd".

     -v | --version
             Print the version number.

     -V | --verbose
             Print progress information.

   NOTES
     The GNUNET_URI is typically obtained from gnunet-search(1).  gnunet-fs-gtk(1) can also be
     used instead of gnunet-download.  If you ever have to abort a download, you can at any time
     continue it by re-issuing gnunet-download with the same filename.  In that case GNUnet will
     not download blocks again that are already present.  GNUnet's file-encoding will ensure file
     integrity, even if the existing file was not downloaded from GNUnet in the first place.
     Temporary information will be appended to the target file until the download is completed.

FILES

     ~/.config/gnunet.conf GNUnet configuration file

SEE ALSO

     gnunet-fs-gtk(1), gnunet-publish(1), gnunet-search(1), gnunet-service-fs(1), gnunet.conf(5)

     The full documentation for gnunet is maintained as a Texinfo manual.  If the info(1) and
     gnunet programs are properly installed at your site, the command

           info gnunet

     should give you access to the complete handbook,

           info gnunet-c-tutorial

     will give you access to a tutorial for developers.

     Depending on your installation, this information is also available in gnunet(7) and
     gnunet-c-tutorial(7).

BUGS

     Report bugs by using https://bugs.gnunet.org or by sending electronic mail to
     ⟨gnunet-developers@gnu.org⟩.