What's the difference between one-dash and two-dashes for command prompt parameters? was closed as 'not constructive'. I disagree. There is a difference, as explained on Unix.SE:

A double dash (--) is used in bash built-in commands and many other commands to signify the end of command options, after which only positional parameters are accepted.

I'd reopen it, but not based on the question you linked to – it deals about the trailing double dash, not the one used for actual parameters. – slhck Dec 28 '11 at 8:11
Ah. I misread the question. I was only focused on the double dash. – iglvzx Dec 28 '11 at 8:19
up vote 1 down vote accepted

It was reopened. Thank you, ♦!


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