Random number from a range in a Bash Script

Posted by Jack on Stack Overflow See other posts from Stack Overflow or by Jack
Published on 2010-03-31T20:21:04Z Indexed on 2010/03/31 20:23 UTC
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bash

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shell

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script

Hi,

I need to generate a random port number between 2000-65000 from a shell script. The problem is $RANDOM is only a 16bit number, so im stuck!

PORT=$(($RANDOM%63000+2001)) would work nicely if it wasn't for the size limitation.

Does anyone have an example of how I can do this, maybe by extracting something from /dev/urandom and getting it within a range?

Thanks.

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