shuf(1) on Linux
The text 18d3ef661648, as Debian 7 (Wheezy) shipped it.
generate random permutations
Flags it lists
-
--echo -
--head-count -
--help -
--input-range -
--output -
--random-source -
--version -
--zero-terminated -
-e -
-i -
-n -
-o -
-z