#!/bin/bash
echo -n " Para Maiuscula ou minuscula [M/m] "
read var
if [ $var = "M" ]; then
      echo -n " que diretorio "
      read dir
for x in `/bin/ls` $dir; do
      y=`echo $x | tr '[:lower:]' '[:upper:]'`
         if [ ! -e $y ]; then
            mv $x $y
         fi
      done
   elif [ $var = "m" ]; then
      echo -n "Que diretório? "
      read dir
      for x in `/bin/ls` $dir; do
         y=`echo $x | tr '[:upper:]' '[:lower:]'`
         if [ ! -e $y ]; then
            mv $x $y
         fi
      done
   fi