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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. With no FILE, or when FILE is -, read standard input. 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 -r, --repeat output lines can be repeated -z, --zero-terminated line delimiter is NUL, not newline --help display this help and exit --version output version information and exit AUTHOR
Written by Paul Eggert. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report shuf translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 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
Full documentation at: <http://www.gnu.org/software/coreutils/shuf> or available locally via: info '(coreutils) shuf invocation' GNU coreutils 8.28 January 2018 SHUF(1)
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