Big (four-byte) $RANDOM

printf %d 0x`dd if=/dev/urandom bs=1 count=4 2>/dev/null | od -x | awk 'NR==1 {print $2$3}'`
Sometimes, in a shell script, you need a random number bigger than the range of $RANDOM. This will print a random number made of four hex values extracted from /dev/urandom.
Sample Output
3312123358

1
By: introp
2009-02-18 16:23:09

What Others Think

Too much typing, here is your command in ruby ruby -e "puts (1..1).map {rand(10 ** 10).to_s.rjust(10,'0')}"
sil · 667 weeks and 2 days ago
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seofox · 2 weeks and 1 day ago

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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