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Top Forums Shell Programming and Scripting Unix random number generate in given range Post 302541260 by drl on Saturday 23rd of July 2011 11:03:09 AM
Old 07-23-2011
Hi.
Code:
shuf -i 10-30 -n 1

produces, in 3 separate runs:
Code:
26
% shuf -i 10-30 -n 1
15
% shuf -i 10-30 -n 1
25

The shuf utility is part of GNU coreutils, Coreutils - GNU core utilities which you could download, configure, compile, etc., if your system does not have coreutils installed or available via your package manager -- easier for Linux than for one of the Unix systems, Solaris, *BSD, etc.

Many features, see on-line man page is at: shuf(1): make random permutations - Linux man page

Best wishes ... cheers, drl
 

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SHUF(1) 							   User Commands							   SHUF(1)

NAME
shuf - generate random permutations SYNOPSIS
shuf [OPTION]... [FILE] shuf -e [OPTION]... [ARG]... shuf -i LO-HI [OPTION]... DESCRIPTION
Write a random permutation of the input lines to standard output. Mandatory arguments to long options are mandatory for short options too. -e, --echo treat each ARG as an input line -i, --input-range=LO-HI treat each number LO through HI as an input line -n, --head-count=COUNT output at most COUNT lines -o, --output=FILE write result to FILE instead of standard output --random-source=FILE get random bytes from FILE -z, --zero-terminated end lines with 0 byte, not newline --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. AUTHOR
Written by Paul Eggert. REPORTING BUGS
Report shuf bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report shuf translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for shuf is maintained as a Texinfo manual. If the info and shuf programs are properly installed at your site, the command info coreutils 'shuf invocation' should give you access to the complete manual. GNU coreutils 8.12.197-032bb September 2011 SHUF(1)
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