Mysql automatic backup script

cd /data/shell/
vim auto_backup_mysql.sh

#!/bin/bash
#auto backup mysql db
#by authors kanghui 2016-6-12
#define backup path
BAK_DIR = / data / backup / `date +% Y% m% d`
MYSQLDB=duscyz #Database
MYSQLUSR=root #username
MYSQLPW=123456 #password
MYSQLCMD=/usr/bin/mysqldump #Backup command


if [ $UID -ne 0 ]; then #if not equal to 0    
     echo "Must to be use root for exec shell...."
     exit
be

if [ ! -d $BAK_DIR ];then #if this directory does not exist
         mkdir -p $BAK_DIR #Then create this directory
         echo -e "\033[32mThe $BAK_DIR Create Successfully!\033[0m"
else  
     echo "This $BAK_DIR is exists....."
be
#Mysql Bachkup command
mysqldump -u$MYSQLUSR -pMYSQLPW -d $MYSQLDB >$BAK_DIR/MYSQLDB.sql

if [ $? -eq 0 ];then #equal to 0, the following information will be output if the backup is successful
     ech0 -e "\033[32mThe Mysql Backup $MYSQLDB successfully!\033[0m"  
else #Otherwise print failure and output the following information
     echo -e "\033[32mThe Mysql Backup $MYSQLDB Failed,please check...033[0m"
be  

 add crontab -e

0 0 * * * /bin/bash /data/shell/auto_backup_mysql.sh >>/tmp/mysql_bak.log