This is a simple bash random number generator, and yet it's overdone!

rand

#!/bin/bash

if ! [ -z $1 ]
then
  if [ $1 == "--help" ] 
  then
    echo -e "Number Randomizer aka Rand \e[1mv1.2.1\e[21m"
    echo "Usage:"
    echo "    rand <range> [<repeats> <show only highest>]"
    echo "    rand <filename> [<repeats> <show only highest>]"
    echo "Example:"
    echo "    rand 10-100 30"
    echo "    rand 40"
    echo "    rand 0-3 300 true"
    echo "    rand list 100"
    echo "Deafult: Range 1-10 once"
    exit
  fi
fi

oh=false
ff=false
rep=1
out=()
min=1
max=10
file=()

if ! [ -z "$1" ]
then

  if [ -f $1 ]
  then
    min=0
    max=0
    while read p
    do
      file[$max]=$p
      max=$[$max+1]
      if [ -z $p ]; then max=$[$max-1]; fi
    done < $1
    max=$[$max-1]
    ff=true
    rep=100
  elif [[ $1 =~ "-" ]]
  then
    IFS="-"
    inv=$1
    ind=0
    for a in $inv
    do
      if ! [ "$a" -eq "$a" ] 2> /dev/null
      then
        echo "Error: Invalid Range!"
        exit
      fi
      ind=$[$ind+1]
      if [ $ind -eq 1 ]
      then
        min=$a
      elif [ $ind -eq 2 ]
      then
        max=$a
      else
        echo "Error: Invalid Range!"
        exit
      fi
    done
    #echo "Min: $min Max: $max"
  elif ! [ "$1" -eq "$1" ] 2> /dev/null
  then
    echo "Error: Invalid Range!"
    exit
  else
    max=$1
  fi
fi

if ! [ -z $2 ]
then
  if ! [ "$2" -eq "$2" ] 2> /dev/null
  then
    echo "Error: Invalid Repete count!"
    exit
  fi
  rep=$2
fi

if ! [ -z $3 ]
then
  if [ $3 == "true" ]
  then
    oh=true
  elif [ $3 == "false" ]
  then
    oh=false
  else
    echo "Error: Invalid expresion!"
    exit
  fi
fi

for ((i=1; i<=$rep; i++))
do
  t=$[ ($RANDOM % ($max + (1 - $min))) + $min ]
  #echo $t
  for ((v=$min; v<=$max; v++))
  do
    if [ $v == $t ]
    then
      out[$v]=$[${out[$v]}+1]
    fi
  done
done

if [ $rep -ne 1 ]
then
  h=0
  hi=0
  for ((n=$min; n<=$max; n++))
  do
    if ! [ -z ${out[$n]} ]
    then
      if ! $oh; then if $ff; then echo "${file[$n]}: ${out[$n]}"; else echo "$n: ${out[$n]}"; fi; fi
      if [ ${out[$n]} -gt $h ]
      then
        h=${out[$n]}
        hi=$n
      fi
    fi
  done
  for ((n=$min; n<=$max; n++))
  do
    if [[ $h -eq ${out[$n]} && $n -ne $hi ]]
    then
      shi=$n
    fi
  done
  if ! $oh; then echo "-----"; fi
  if $ff
  then
    if [ -z $shi ]
    then
      echo "Highest: ${file[$hi]}"
    else
      echo "Highest: ${file[$hi]} and ${file[$shi]}"
    fi
  else
    if [ -z $shi ]
    then
      echo "Highest: $hi"
    else
      echo "Highest: $hi and $shi"
    fi
  fi
else
  for n in ${!out[@]}; do echo $n; done
fi