How to select lines randomly without replacement in UNIX? Post: 302981466

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shuf

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)