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Deja-dup (now Ubuntu Backup) is just a GUI for duplicity, therefore it should store the config files somewhere. I would like to changed the backup volume size to something like 300MB and the increase the --full-if-older-than variable. is this possible?

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3 Answers 3

up vote 5 down vote accepted

This has changed in various Déjà Dup versions, but I believe it is currently at:


What can't you change using the GUI front-end?


from: How do I also backup my deja Dup settings?

The settings used to be stored there, and the files are still present.

In more recent version they are stored in:

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I'd like to increase the volume size and be more conservative with full backups (once every 6 months or so). I checked the location you mention but I cannot find where this parameters are kept. Any ideas? – ECII Jun 3 '12 at 5:07
Systems Settings >> Backup, last tab: 'Schedule' – david6 Jun 3 '12 at 6:32
The settings are in file '~/.gconf/apps/deja-dup/%conf.xml', but that is only for experts. – david6 Jun 3 '12 at 6:34
These are more likely to be settings in scripts (for Duplicity) that are used by Déjà Dup. see: OR (I would need to do more research to answer better.) – david6 Jun 3 '12 at 7:14
The UI is inconvenient at best: it is very small and not resizable (12.04), and does not expose .* files/directories, many of which contain big caches or logs not needing to be backed up. – FGM Dec 29 '14 at 10:12

The deja-dup settings can also be changed with dconf-editor in the dconf-tools apt package. The settings are in org.gnome.DejaDup.

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+1 for best answer since Deja Dup / duplicity does not have its own config files anymore. Note: Schema org.gnome.DejaDup equals org > gnome > deja-dup in the dconf editor tree view :) – user17254 Dec 16 '14 at 8:14
Great answer, though caution: Opening the "Backups" app in Ubuntu and closing it again may cause some settings to revert. For example, using the dconf-editor I set backups to be kept at least 90 days (instead of the minimum available in the GUI app of 6 months). When I opened the app, it showed 90 days. But when I closed it and re-opened, it had reverted to 6 months. – DavidO Mar 9 at 22:59

fwiw, added a dconf setting if you build this from source, it will create a volsize setting in org.gnome.DejaDup. you can change it to 500mb with dconf-editor.

patched source code for deja-dup

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Amazing, the volume size of backup files is hardcoded!…. So the answer to the actual question is: No, there is no config option. – Jack Miller 15 hours ago

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