Hello
When I Migrate Virtual Server
I selected the directory containing full backup files of cPanel
And I got this error
Validating migration file …
… validation failed : Not a cPanel tar.gz file : Unknown compression format
Is it normal?
I have many full backup files, should I migrate manually one by one?
Howdy,
Does that work for you if you do it one at a time? Is it only failing when you point it to a directory?
-Eric
Yes, It works each full backup file but directory.
I have many full backup files 
Plz fix it…
Well, I suspect that means it’s not possible to migrate more than one cPanel backup at a time.
The documentation on that page suggests it’s designed to migrate one domain at a time – it may just be Virtualmin backups that can be restored a directory at a time.
What you could do is use the Virtualmin command line tools to perform your migration.
In the command line, you can run this:
virtualmin migrate-domain
To see the available options. You could write a script that loops over all the backup files, and runs that command on each of them.
Note that I believe cPanel backups require you to set a password for each domain (which is probably why multiple domains can’t be imported all at once from within the GUI), so you may need to pass in the --pass option.
-Eric
Oh! Thank you Eric.
You saved me 