How to Automatically Backup MySQL Every Day（mysql每天备份）

MySQL is a widely used database management system that stores and retrieves data quickly and securely. It can be used for a variety of purposes from small databases on websites to large, distributed applications. As such, backing up data is an essential part of its administration. In this article, we will show you how to automatically back up your MySQL database every day using a cron job.

Before trying to create a cron job, please note that you will need to have access to a Linux based server with cron installed. Additionally, you will need to have shell access to the MySQL server as well as a database user that has the privileges to perform backups.

To create a cron job to back up our database, we need to do two things:

Step 1: Generate the necessary SQL command to perform the backup

Assuming you have a database called my_database, the following SQL query can be used to backup the database to a file called database.sql:

mysqldump -u [database_user] -p[database_user_password] my_database > database.sql

You can adjust the database user, database user password and database name as necessary. Once this command is saved, we can move on to the next step.

Step 2: Create the cron job

To set up the cron job, open the terminal on the server and type:

crontab -e

This will open the crontab editor. You can then type the following command to schedule the backup to run automatically every day at midnight:

0 0 * * * mysqldump -u [database_user] -p[database_user_password] my_database > database.sql

Save the file and exit the editor. This cron job will now run automatically every day at midnight to backup your MySQL database.

By following these steps, you can create a cron job to automatically back up your MySQL database every day. This will ensure that your data is kept safe, and can be easily accessed and restored in the event of an issue or disaster.