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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/coreutils.texi | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index 87fb3dcb7..bb652aca5 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -1240,6 +1240,21 @@ operating system. To reproduce the results of an earlier invocation of a command, you can save some random data into a file and then use that file as the random source in earlier and later invocations of the command. +@cindex random seed +Rather than depending on a file, one can generate a reproducible +arbitrary amount of pseudo-random data given a seed value, using +for example: + +@example +get_seeded_random() +@{ + seed="$1" + openssl enc -aes-256-ctr -pass pass:"$seed" -nosalt \ + </dev/zero 2>/dev/null +@} + +shuf -i1-100 --random-source=<(get_seeded_random 42) +@end example @node Target directory @section Target directory |