Linux Command Library


generate random permutations

- Randomize the order of lines in a file and output the result:
shuf [filename]

- Only output the first n entries of the result:
shuf -n [n] [filename]

- Write output to another file:
shuf -o [another_filename] [filename]

- Generate random numbers in range:
shuf -i [low]-[high]

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

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
get random bytes from FILE
-r, --repeat
output lines can be repeated
-z, --zero-terminated
line delimiter is NUL, not newline
display this help and exit
output version information and exit

Written by Paul Eggert.

GNU coreutils online help: <> Report shuf translation bugs to <>

Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

Full documentation at: <> or available locally via: info '(coreutils) shuf invocation'

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