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What is -O- option in wget?

The Quick Answer

  • -O flag is the short notation for the flag --output-document in wget command-line utility.
  • The hypen - after the flag denotes STDOUT.

Thus, wget -O- or wget -O - prints the result returned  from that URL in your terminal output or STDOUT.

Learn By Example

  • wget -O writes the output to index.html file
  • wget -O custom.txt writes the output to your custom.txt file as mentioned
  • wget -O - writes output to your terminal's STDOUT