多项选择题 A corrupted file system is now repaired and back in use. Some， but not all of the files within the file  systems have been deleted. The only backup of this file system is a month-old tar archive. This archive will need to be restored as root.  Which two statements correctly describe the effects of the restore operation？（）

单项选择题 After you back up /export using a file system snapshot， and you have removed the snapshot， you also need to remove the backing store. If the snapshot was created with：  # mkdir /var/tmp/backup-snaps  # fssnap -o  bs=/var/tmp/backup-snaps /export   Which file do you need to remove？ （）

单项选择题 You need to restore some files from a file system. The file system was backed up from a snapshot.  Which command will correctly restore these files？（）