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Re: RANDOM not random under bash 2.04.11(1)-release
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From: |
Paul Jarc |
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Subject: |
Re: RANDOM not random under bash 2.04.11(1)-release |
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Date: |
Tue, 24 Jul 2001 15:27:42 -0400 |
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User-agent: |
Gnus/5.090004 (Oort Gnus v0.04) Emacs/20.7 |
"Todd A. Jacobs" <tjacobs@codegnome.org> writes:
> The following command *always* returns values 0..3 in numerical order, no
> matter how many times it's called:
>
> echo $(( $RANDOM % 4 ))
Many PRNGs give predictable sequences in the low-order bits. Use the
high-order bits instead: echo $(( $RANDOM >> 13 ))
paul