#!/bin/bash# How random is RANDOM?RANDOM=$$       # Reseed the random number generator using script process ID.PIPS=6          # A die has 6 pips.MAXTHROWS=600   # Increase this if you have nothing better to do with your time.throw=0         # Throw count.ones=0          #  Must initialize counts to zero,twos=0          #+ since an uninitialized variable is null, not zero.threes=0fours=0fives=0sixes=0print_result (){echoecho "ones =   $ones"echo "twos =   $twos"echo "threes = $threes"echo "fours =  $fours"echo "fives =  $fives"echo "sixes =  $sixes"echo}update_count(){case "$1" in  0) let "ones += 1";;   # Since die has no "zero", this corresponds to 1.  1) let "twos += 1";;   # And this to 2, etc.  2) let "threes += 1";;  3) let "fours += 1";;  4) let "fives += 1";;  5) let "sixes += 1";;esac}echowhile [ "$throw" -lt "$MAXTHROWS" ]do  let "die1 = RANDOM % $PIPS"  update_count $die1  let "throw += 1"done  print_resultexit 0#  The scores should distribute fairly evenly, assuming RANDOM is fairly random.#  With $MAXTHROWS at 600, all should cluster around 100, plus-or-minus 20 or so.##  Keep in mind that RANDOM is a pseudorandom generator,#+ and not a spectacularly good one at that.#  Randomness is a deep and complex subject.#  Sufficiently long "random" sequences may exhibit#+ chaotic and other "non-random" behavior.# Exercise (easy):# ---------------# Rewrite this script to flip a coin 1000 times.# Choices are "HEADS" and "TAILS".