mysql多数据库备份脚本

如有问题请大家提出来！谢谢

#!/bin/bash
#####################################
#Mysql backup
#Copyright (c) 2012 <[email protected]>
#Author: Xavier
#Version: 2012/02/20 11:30 v0.1.2
#####################################
DBHOST=localhost #Database server addres
DBUSER=root     #Database user name
PASSWD=aaaaa    #Database password
DATABASES="information_schema|Database" #Exclude do not need to backup the database
DATABASE=
SQL="show databases;"   #SQL statements
GETDATA=`mysql -h $DBHOST -u $DBUSER --password=$PASSWD $DATABASE -e "$SQL" |egrep -v "$DATABASES"` #Get database name
DATE=`date +%Y-%m-%d`   #Get current date
AGO_DATE=`date -d '15 day ago' "+%Y-%m-%d"` #Get 15 days before date
BACKUP_PATH="/mysqlbackup/$DATE/"  #Backup path
AGO_BACKUP_PATH="/mysqlbackup/$AGO_DATE/" #15 days before backup path

#Cycle to backup mysql database
for GETDATA in $GETDATA
do
    if [ ! -f  "$BACKUP_PATH" ];then
        mkdir -p  $BACKUP_PATH
    else
        echo error >> /dev/null
    fi
    /usr/bin/mysqldump -p$PASSWD --opt $GETDATA > $BACKUP_PATH$GETDATA.sql 2>/dev/null
done

    /bin/tar czf $BACKUP_PATH$DATE.tar.gz $BACKUP_PATH*.sql

#Detected 15 days before the backup file exists
#Exist, then delete
#Does not exist exit
if [ -d  "$AGO_BACKUP_PATH" ];then
    /bin/rm -fr $AGO_BACKUP_PATH
    /bin/rm -rf $AGO_BACKUP_PATH$AGO_DATE.tar.gz
fi