自动备份MYSQL数据库，自动删除10天前的备份

#!/bin/sh
#
user_db="root"
pass_db="passwd"
host_db="localhost"
name_db="mysqlname"
port="3306"
ls /bak/mydata/ &> /dev/null
if [ $? -ne 2 ];then
mkdir -p /bak/mydata &> /dev/null
fi
/usr/bin/mysqldump --opt -u$user_db -p$passwd_db -h$localhost -P$port $name_db > /bak/mydata/$name_db_`date +%F`.sql
#
find /bak/mydata -type f -mtime +10 -exec rm -f {} \; &> /dev/null