Backup verification and get alert

Hi all,

I want to know how to verify the MySQL dumps are corruption free from get the XtraBackup and how to get the alert from when backup failed/success. Also i want to know using the XtraBackup when dumping the MySQL it will be save with .xbstream extension, after prepare it will be showing the files and it means to restore the DB we must move or remove the files in /var/lib/mysql/ and prepared files to copy to that directory. i want to know how to restore the specific DB.