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You can exclude more system folders or individual files which are not necessary for the backup and can be recreated after the restore procedure, like /lost+found, /mnt, /media, /tmp, /usr ...
Restoring the above backup procedure is as simple as becoming root and typing:
tar zxpf backup.tgz -C /
You can extract any file or directory out of the backup.tgz file for recovery, for instance, if you have a corrupt or mis-configured fstab file, you could simply issue the command:
tar zxpf backup.tgz /ect/fstab -C /
v add verbose option to see files processed
A far safer solution is to restore the desired files under a different directory, and then compare, move, or update the files to their original locations afterward.
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