shuf man page

shuf — generate random permutations


shuf filename

shuf -n n filename

shuf -o another_filename filename

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.

Reporting Bugs

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

See Also

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

Referenced By


December 2017 GNU coreutils 8.29 User Commands