Generating a Random String of 'n' length

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Generating a POSIX random number?

Hi Guys and gals... As you know I am getting to grips with POSIX and hit this stumbling block. Generating two random numbers 0 to 255 POSIXly. Speed in not important hence the 'sleep 1' command. I have done a demo that works, but it sure is ugly! Is there a better way? #!/bin/sh # Random...

2. Shell Programming and Scripting

Random number generating script?

Having a hard time with this. Very new to scripting and linux. Spent all sunday trying to do this. Appreciate some help and maybe help breaking down what the syntax does. Create a Bash program. It should have the following properties • Creates a secret number between 1 and 100 i. The...

3. Shell Programming and Scripting

Generating Random Number in certain range

Hi there I am trying to generate a random number between 40 and 70 using the shell here is my code so far and it keeps going above 70. all help much appreciated! comp=$(( RANDOM%70+40 )) echo $comp

4. UNIX for Dummies Questions & Answers

Generating 512MB file with dd using random data

Hello. Could anyone help me with my little annoying problem? I have to generate a 512 MB file made up with random data using DD. After some internet digging I found out that the command is: dd if=/dev/urandom of=/exemple/file bs=512MB After running this command the...

5. Shell Programming and Scripting

Remove 3rd character from the end of a random-length string

Hi, I hope someone can share there scripting fu on my problem, I would like to delete the 3rd character from a random length of string starting from the end Example Output Hope you can help me.. Thanks in advance..

6. Shell Programming and Scripting

Generating Gaussian Distributed Random Numbers

I want to generate an awk function that generated a Gaussian distributed set of random numbers. I need to implement the thing below in awk. Rnd is just a uniform random number between 0 and 1 function rgaussian(r1, r2) { Do v1 = 2 * Rnd - 1 v2 = 2 * Rnd - 1 ...

7. Programming

C Help; generating a random number.

Im new to C, and Im having a hard time getting a random number. In bash, I would do something similar to the following to get a random number; #!/bin/bash seed1=$RANDOM seed2=$RANDOM seed3=$RANDOM SEED=`expr $seed1 * $seed2 / $seed3` echo ${SEED%.*} Now, in online examples...

8. Programming

generating 16 digit random number in C

Hi, How can we generate 16 digit random nos in C.

9. Shell Programming and Scripting

Generating random numbers

Hi, I am having trouble with generating random numbers. can this be done with awk? So I have a file that looks like this: 23 30 24 40 26 34 So column1 is start and column2 is end. I want to generate 3 random #'s between start and stop: So the output will look like this: ...

10. Shell Programming and Scripting

Generating random number within a specific range (0.5-1.5)

Hello, need a way to generate numbers within 0.5-1.5 range Has to be totally random: 0.6 1.1 0.8 1.5 0.6 and so on.... How to?

LEARN ABOUT PHP

gmp_random

GMP_RANDOM(3)								 1							     GMP_RANDOM(3)

gmp_random - Random number

SYNOPSIS

       GMP gmp_random ([int  $limiter = 20])

DESCRIPTION

	Generate a random number. The number will be between zero and the number of bits per limb multiplied by $limiter. If $limiter is negative,
       negative numbers are generated.

	A limb is an internal GMP mechanism. The number of bits in a limb is not static, and can vary from system to system. Generally, the number
       of bits in a limb is either 16 or 32, but this is not guaranteed.

PARAMETERS

	      o $limiter
		-  The	limiter.  Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string pro-
		vided that it is possible to convert the latter to a number.

RETURN VALUES

	A random GMP number.

EXAMPLES

       Example #1

	      gmp_random(3) example

	      <?php
	      $rand1 = gmp_random(1); // random number from 0 to 1 * bits per limb
	      $rand2 = gmp_random(2); // random number from 0 to 2 * bits per limb

	      echo gmp_strval($rand1) . "
";
	      echo gmp_strval($rand2) . "
";
	      ?>

	      The above example will output:

	      1915834968
	      8642564075890328087

PHP Documentation Group 													     GMP_RANDOM(3)

Shell Programming and Scripting