Restrict RAND to producing 63 random bits

[Robert Moskowitz]

I kind of like that.  I was thinking how to use a mask like you have, 
but I just don't have the skills in that direction to figure it out.

I may document both ways.

thanks

On 7/20/23 17:39, James wrote:
> An alternative using openssl
>
> $ printf "%016X\n" $((16#$(openssl rand -hex 8) & 0x7fffffffffffffff))
> 4B0193AE43934F09
>
>> To get the leading zeros so it will generate an 8-byte serial number, 
>> I added:
>>
>> printf "%016X\n" $(shuf -rn 1 -i 1-9223372036854775807 
>> --random-source=/dev/urandom)
>>
>> an example output is:
>>
>> 0E12E1A664C30AE1
>>
>> I had to run it a couple dozen times before it generated a small 
>> enough value to need to pad it.
>
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