1.创建个备份存储目录
mkdir  /root/backup/
2.以下内容写到dbbackup.sh

#!/bin/bash
cd  /root/backup/
mysqldump -uroot -pmima123  datatest >/root/backup/datatest`date +%Y-%m-%d`.sql
mysqldump -uroot -pmima123  datatest1 >/root/backup/datatest1`date +%Y-%m-%d`.sql

chmod +x dbbackup.sh

liunx下MySQL备份解决方案