git difference on parameter one dash and two dashes

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That’s not really git specific. Many programs use the following convention:

  • single-letter parameter: one dash
  • multi-letter parameter: two dashes

This is handy, because it allows you to specify many single-letter parmeters at once with a single dash and all letters of the parameters you need: ls -al is equivalent to ls -a -l.

Often, one-letter parameters are the most used ones and can have a longer equivalent with two dashes: for example git add -v and git add --verbose mean the same.

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