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I am looking for something that has an usage like

passgen <length> <charset>
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2 Answers 2

up vote 1 down vote accepted

Cross-Platform: Using PERL

There's a PERL password generator that works for Windows, *nix, OS X, etc.

Usage: genpass [-OPTIONS] LENGTH
-s, --symbols       Exclude symbol characters.
-n, --numbers       Exclude number characters.
-u, --uppercase     Exclude uppercase characters.
-l, --lowercase     Exclude lowercase characters.

On Windows, it can be converted into an executable.

Windows-only

Not specifically what you want, but could also come in useful. In the command line, type:

net user administrator /random    

enter image description here

Unix/Linux

See answers of this question: Random password generator: many, in columns, on command line, in Linux

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search.cpan.org/~rschupp/PAR-Packer-1.009/lib/pp.pm, converts a perl script to an executable. So problem solved. –  John May 9 '11 at 11:28
    
@johnthexiii Oh, nice. I added it to the answer for later reference. –  slhck May 9 '11 at 11:42

Take a look at SecurePassword Kit command line password generator. It has the follwing syntax:

gspk.exe /g [-l:password_length] [-a:charset_options] 
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Read this post, you must. –  KronoS Apr 17 '13 at 17:20

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