When trying to perform a backup in Plesk, the following error is encountered:
<message id="b9101565-7ecb-4aa2-8cd8-4cdff65521b1" severity="warning" code="msgtext">
<description>For security reason backup is performed on behalf of subscription system user. System user has no read access to path/to/file_or_folder file.</description>
As stated in the error message, the backup is performed on behalf of the subscription system user. This user lacks the necessary permissions for copying a file (or a folder).
There may be more than one instance of this inconsistency. The files which are affected will not be backed up.
Check the permissions and owner for the folder/file mentioned in the error, as well as all other files which may have incorrect permissions. Make sure that at least the system user has the following permissions:
execute) for all directories in the tree that is backed up
read) for all files in those directories
Set the proper permissions with the
chmodcommands. Please refer to their manual pages:
# chmod +r path/to/file_or_folder
# chown systemuser:psacln path/to/file_or_folder
chmod +x on folders (the
traverse permission). Optionally, use the
-R flag to perform a recursive operation.