Random numbers with Ruby
-bash2-2.05b$ uname -sr
FreeBSD 5.4-RELEASE-p14
-bash2-2.05b$ ruby -e "puts (1..20).map {rand(10 ** 10).to_s.rjust(10,'0')}"
6366075576
2917975774
7329745840
8691581041
5890408189
1638634981
0295194105
6344513644
4301587535
4936779610
1481540380
5683771498
6753375812
4915063505
1500897963
8012594603
1481070124
3665078190
0436854511
6307883169
What do you think?
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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echo $RANDOMcat /dev/urandom | hexdump -d | awk '{ print $2$3}' | head -n20the ruby is still faster ... cheers for choosing ruby