Why the test of both $# and $1? tr -dc '!-~' </dev/urandom | head -c ${1-12}... | Hacker News

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		ralph on June 10, 2012 \| parent \| context \| favorite \| on: Lessons learned from cracking 2 million LinkedIn p... Why the test of both $# and $1? `tr -dc '!-~' </dev/urandom \| head -c ${1-12}; echo` Change to A-Za-z0-9, etc., to suit.

Locke1689 on June 11, 2012 [–]

Mostly because I'm terrible at shell scripting. Thanks.

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