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Что означает отдельный дефис (-) в Curl?

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Что означает отдельный дефис (-) в Curl?

Что означает отдельный дефис (между -C& -O) в этой команде?

curl -C - -O http://www.intersil.com/content/dam/Intersil/documents/fn67/fn6742.pdf

FWIW- Я следую руководствуздесь.

решение1

-C -автоматически определяет, как возобновить передачу, на основе входных и выходных файлов.

Отman curl(обратите внимание на второй абзац):

   -C/--continue-at <offset>
          Continue/Resume a previous file transfer at the  given  offset.
          The  given  offset  is  the  exact number of bytes that will be
          skipped, counting from the beginning of the source file  before
          it  is  transferred  to the destination.  If used with uploads,
          the FTP server command SIZE will not be used by curl.

          Use "-C -" to tell curl to automatically find out where/how  to
          resume  the transfer. It then uses the given output/input files
          to figure that out.

          If this option is used several times,  the  last  one  will  be
          used.

решение2

Он просто возобновит загрузку с последней позиции, счеловек локон:

   -C/--continue-at <offset>
          Continue/Resume a previous file transfer at  the  given  offset.
          The  given  offset  is  the  exact  number of bytes that will be
          skipped, counting from the beginning of the source  file  before
          it is transferred to the destination.  If used with uploads, the
          FTP server command SIZE will not be used by curl.

          Use "-C -" to tell curl to automatically find out  where/how  to
          resume  the  transfer. It then uses the given output/input files
          to figure that out.

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