I understand that Déjà-Dup ocassionally does full backups, so that a single corrupted backup in the chain will not invalidate all following backups. But since I am going to reinstall the system, I would like to have one final backup. Déjà-Dup says, that it is time for a full backup, which would be a waste of space in this case.

Question: Can I force Déjà-Dup to create only an incremental backup?

Edit: I have forgotten to mention, that déjà-dup is set up to backup two different folders

  • if you are going to reinstall, I would recommend a full backup – ravery Sep 20 '17 at 5:59
  • Yeah, I think I will do a full backup. It is not worth the struggel and I will not need the old ones, if I think about it – Adrian Hinrichs Sep 20 '17 at 9:06

You can force an incremental backup by using the command line tool duplicity.

man duplicity states that it supports the command

 incr <folder> <url>
               If this is requested an incremental backup will be performed.
               Duplicity will abort if no old signatures can be found.

If you have deja-dup set up to back up from many different folders this might be a clumsy or unworkable action (I am not a sophisticated duplicity user). However if you are just backing up home or something simple it could work for you.

Consult man duplicity for more info.

| improve this answer | |
  • Thank you for the answer, I do indeed backup two different folders, I forgot to mention it in the original question – Adrian Hinrichs Sep 19 '17 at 21:52

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