Backup mongo database with all collection to folder in shell

mongoDBBackup.sh

# (1) prompt user, and read command line argument
read -p "Run the backUp DB script now? (y|n) : " answer

# (2) handle the command line argument we were given
while true
do
  case $answer in
   [yY]* ) read -p "Enter DB port: " port
           read -p "Enter DB name: " dbName
           read -p "Enter output file path with name or name: " output
           mongodump --port $port -d $dbName -o $output
           echo "Okay, well done."
           break;;

   [nN]* )  echo "Have, a nice day!"
            exit;;

   * ) echo "Dude, just enter Y or N, please."; break ;;
  esac
done