Sergi Anastasia <[email protected]> writes:

> what does "REST and RANGE" mean?  an option or an cron option or an app?

it is a HTTP feature that allows clients to request only a part of a
resource.  E.g. you've already downloaded 90Mb of a 100Mb file and your
connection drops, with a Range request (and assuming the server supports
it) you can request only the remaining 10Mb in your next attempt.

You can ask wget to use a range request with the -c option and using an
existing file.  The development version of wget offers a new --start-pos
option, if you would like to specify the range by yourself.

If you need more details about this HTTP feature:

  http://tools.ietf.org/html/rfc7233#section-4.2

Regards,
Giuseppe

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