These time I'll demonstrate more options of the `shuf` program. It can do quite a lot. #Shuffle a list of numbers $ shuf -i 1-6 5 4 6 3 2 1 #Generate random numbers from a range until aborted $ shuf -r -i 1-6 # type C-c to abort 3 5 5 4 4 6 #Random numbers with a limit $ shuf -n 10 -r -i 1-6 6 3 2 4 1 3 1 6 5 2 #Shuffle and print command arguments $ shuf -e one two three four five six five four one two six three #Random command arguments with a limit $ shuf -n 10 -r -e one two three four five six six six five five six three one four three five Ask your questions about these examples below. Here's the full manual for `shuf`: https://www.gnu.org/software/coreutils/manual/html_node/shuf-invocation.html