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(I also don't understand how to use this parameter. If anyone knows, please let me know.)
get random bytes from FILE
-r, --repeat
output lines can be repeated(In other words, output contents continually and random permutations on the standard output.)
-z, --zero-terminated
line delimiter is NUL, not newline