Follow the following steps to generate MySQL Database backup
- Login to Virtualmin
 - Go to Webmin
 - Under Servers >> Click on MySQL Database Server
 - After that Scroll down, you will see the backup database button, click on it
 - Enter the Backup destination path under "Backup to directory"
 - After that Scroll down and click on the Backup Now button
 
You can also schedule backups under "Backup schedule"

