Bash script of backing up multiple dbs

gistfile1.txt

#!/bin/bash

_dbusername="my_backup_username"
_dbpassword="my_backup_password"
_output="/home/dbbackup/_database_backups"
_dow="$(date +'%A')"

declare -a arr=("my_db_1" "my_db_2" "my_db_3")

for i in "${arr[@]}"
do
   echo "$i"
   _daily="${i}_${_dow}.sql"
   rm -f $_daily
   rm -f ${i}_latest.sql
   mysqldump --hex-blob -u${_dbusername} -p${_dbpassword} ${i} > ${_output}/${_daily}
   cp ${_output}/${_daily} ${_output}/${i}_latest.sql

done