Menu
I know there are plenty of random number generators out there, but I am looking for something that may be a little more predictable. Is there a way to get a "random" number (one that would be the same in every instance) given a string? I would like to do this in bash. I am looking for something a little more advanced than the count of characters in the string, but not as advanced as a full checksum of it.
The end goal is to get a decimal value, so this could be ran against a string multiple times repeating the result.
256
The random number or a range of random numbers can be generated using the $RANDOM variable. It generates a random number between 0 and 32767 by default. But you can set the range of numbers for generating random numbers by dividing the value of $RANDOM with a specific value.
$RANDOM is an internal Bash function (not a constant) that returns a pseudorandom integer in the range 0 - 32767. $RANDOM should not be used to generate an encryption key. Example 9-23. Generating random numbers. #!/bin/bash # $RANDOM returns a different random integer at each invocation. #
You need a random number, but you don't want a full checksum, it's contradiction. I think md5sum and sha1sum is really easy to use and should fit your needs:
md5sum <<< "$your_str"
or
sha1sum <<< "$your_str"
Update:
If you need decimal numbers, just:
n=$(md5sum <<< "$your_str")
echo $((0x${n%% *}))
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
