Generating a Random String of 'n' length


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Generating a Random String of 'n' length
# 8  
Old 11-04-2015
Amazing functions!
Only I don't like the 62.
Applied to my script
Code:
cat randstring.pl

Code:
#!/usr/bin/perl -l
@allchars=( A..Z, a..z, 0..9 );
print map { @allchars[rand $#allchars+1] } 1..pop

And embedded in a shell script
Code:
n=10
perl -le '@allchars=( A..Z, a..z, 0..9 ); print map { @allchars[rand $#allchars+1] } 1..pop' $n

Login or Register to Ask a Question

Previous Thread | Next Thread

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... (12 Replies)
Discussion started by: wisecracker
12 Replies

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 Replies)
Discussion started by: LINUXnoob15
3 Replies

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 Replies)
Discussion started by: faintingquiche
4 Replies

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... (2 Replies)
Discussion started by: razolo13
2 Replies

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.. (3 Replies)
Discussion started by: jao_madn
3 Replies

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 ... (0 Replies)
Discussion started by: kristinu
0 Replies

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... (4 Replies)
Discussion started by: trey85stang
4 Replies

8. Programming

generating 16 digit random number in C

Hi, How can we generate 16 digit random nos in C. (10 Replies)
Discussion started by: ajaysahoo
10 Replies

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: ... (9 Replies)
Discussion started by: phil_heath
9 Replies

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? (10 Replies)
Discussion started by: TehOne
10 Replies
Login or Register to Ask a Question
WWW::Mechanize::FormFiller::Value::Random::Chars(3pm)	User Contributed Perl Documentation  WWW::Mechanize::FormFiller::Value::Random::Chars(3pm)

NAME
WWW::Mechanize::FormFiller::Value::Random::Chars - Fill characters into an HTML form field SYNOPSIS
use WWW::Mechanize::FormFiller; use WWW::Mechanize::FormFiller::Value::Random::Chars; my $f = WWW::Mechanize::FormFiller->new(); # Create a random value for the HTML field "login" my $login = WWW::Mechanize::FormFiller::Value::Random::Chars->new( login => set => 'alpha', min => 3, max => 8 ); $f->add_value( login => $login ); # Alternatively take the following shorthand, which adds the # field to the list as well : # If there is no password, put a random one out of the list there my $password = $f->add_filler( password => 'Random::Chars' ); DESCRIPTION
This class provides a way to write a randomly chosen value into a HTML field. new NAME, LIST Creates a new value which will correspond to the HTML field "NAME". The "LIST" is the list of arguments passed to Data::Random::rand_chars. If the list is empty, "set => 'alpha', min => 5, max => 8" is assumed. name [NEWNAME] Gets and sets the name of the HTML field this value corresponds to. value FIELD Returns the value to put into the HTML field. EXPORT None by default. COPYRIGHT AND LICENSE This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. Copyright (C) 2002,2003 Max Maischein AUTHOR
Max Maischein, <corion@cpan.org> Please contact me if you find bugs or otherwise improve the module. More tests are also very welcome ! SEE ALSO
Data::Random, WWW::Mechanize, WWW::Mechanize::Shell, WWW::Mechanize::FormFiller, WWW::Mechanize::FormFiller::Value::Value, WWW::Mechanize::FormFiller::Value::Default, WWW::Mechanize::FormFiller::Value::Fixed, WWW::Mechanize::FormFiller::Value::Interactive perl v5.10.1 2009-04-24 WWW::Mechanize::FormFiller::Value::Random::Chars(3pm)