Linux Commands Examples

A great documentation place for Linux commands

shuf

generate random permutations

Synopsis

shuf [OPTION]... [FILE]
shuf -e [OPTION]... [ARG]...
shuf -i LO-HI [OPTION]...


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examples

0
source 
            

  shuf hoge.txt
0
source 
            

  ls $1 | shuf | less
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source 
            

  shuf -n ${1:-1} /usr/share/dict/words
0
source 
            

  ls /media/Movies | shuf -n 1
0
source 
            

  cat | shuf | head -n 1
0
source 
            

  for i in {1..5000}; do echo "A
  AAPL B L 435."`shuf -i
  0-50 -n 1` $((`shuf -i 10-1000
  -n 1`*10)) "usr"`shuf -i 1-50
  -n 1` >> trades; done; for i in {1..5000}; do echo "A
  AAPL S L 435."`shuf -i 0-50 -n
  1` $((`shuf -i 10-1000 -n 1`*10)) "usr"`shuf -i 1-50 -n
  1` >> trades; done; for i in {1..5000}; do echo "A
  GOOG B L 843."`shuf -i 35-95 -n
  1` $((`shuf -i 10-1000 -n 1`*10)) "usr"`shuf -i 1-50 -n
  1` >> trades; done; for i in {1..5000}; do echo "A
  GOOG S L 843."`shuf -i 35-95 -n
  1` $((`shuf -i 10-1000 -n 1`*10)) "usr"`shuf -i 1-50 -n
  1` >> trades; done; for i in {1..5000}; do echo "A
  MSFT B L 28."`shuf -i 20-45 -n
  1` $((`shuf -i 10-1000 -n 1`*10)) "usr"`shuf -i 1-50 -n
  1` >> trades; done; for i in {1..5000}; do echo "A
  MSFT S L 28."`shuf -i 20-45 -n
  1` $((`shuf -i 10-1000 -n 1`*10)) "usr"`shuf -i 1-50 -n
  1` >> trades; done; shuf trades > trades.i; rm -f trades; shuf
  trades.i > trades.in; rm -f trades.i




  for i in {1..5000}; do echo "A
  AAPL B L 435."`shuf -i
  0-50 -n 1` $((`shuf -i 10-1000
  -n 1`*10)) "usr"`shuf -i 1-50
  -n 1` >> trades; done; for i in {1..5000}; do echo "A
  AAPL S L 435."`shuf -i 0-50 -n
  1` $((`shuf -i 10-1000 -n 1`*10)) "usr"`shuf -i 1-50 -n
  1` >> trades; done; for i in {1..5000}; do echo "A
  GOOG B L 843."`shuf -i 35-95 -n
  1` $((`shuf -i 10-1000 -n 1`*10)) "usr"`shuf -i 1-50 -n
  1` >> trades; done; for i in {1..5000}; do echo "A
  GOOG S L 843."`shuf -i 35-95 -n
  1` $((`shuf -i 10-1000 -n 1`*10)) "usr"`shuf -i 1-50 -n
  1` >> trades; done; for i in {1..5000}; do

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.

copyright

Copyright © 2012 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.

reporting bugs

Report shuf bugs to bug-coreutils[:at:]gnu[:dot:]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/>


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.


author

Written by Paul Eggert.

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