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Diffstat (limited to 'doc/coreutils.texi')
| -rw-r--r-- | doc/coreutils.texi | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index b3233f602..ca10a16ff 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -4945,6 +4945,16 @@ commands like @code{shuf -o F <F} and @code{cat F | shuf -o F}. Use @var{file} as a source of random data used to determine which permutation to generate. @xref{Random sources}. +@item -r +@itemx --repetitions +@opindex -r +@opindex --repetitions +@cindex allowing repetitions in output values +Changes the default behaviour of @command{shuf}, allowing repetition in +output values (in which case, @option{--head-count} can be larger +than the number of input values). If @option{--head-count} is not +specified, output a single random value. + @zeroTerminatedOption @end table @@ -5004,6 +5014,33 @@ general, if there are @var{n} input lines, there are @var{n}! (i.e., @var{n} factorial, or @var{n} * (@var{n} - 1) * @dots{} * 1) possible output permutations. +@noindent +To output 50 random numbers between 0 and 9, use: + +@example +shuf --repetitions --input-range 0-9 --head-count 50 +@end example + +@noindent +or (using short options): + +@example +shuf -r -i0-9 -n50 +@end example + +@noindent +To simulate 100 coin flips, use: + +@example +shuf -r -n100 -e Head Tail +@end example + +@noindent +or +@example +printf '%s\n' Head Tail | shuf -r -n100 +@end example + @exitstatus |