Ubuntu – How does deja-dup react to whole folders being moved

Déjà Dup is the front-end for the duplicity program, Duplicity stores its data in ~/.cache/duplicity. That folder can safely be removed, if you connect with an earlier backup, those files will be recreated from the backup.

Settings for Déjà Dup are stored in dconf. (source: Where is the configuration for dejadup stored?).

To quote Michael Terry:

Hello! The configuration for Deja Dup is stored in dconf, which you can view with dconf-editor (which in Ubuntu is available in the dconf-tools package).

However, to view or edit your saved passwords, you should use the Passwords & Encryption Keys preference utility that comes with GNOME. That stores saved passwords for remote sites as well as the encryption password that Deja Dup saves if you chose to encrypt your backup.

As for system-wide settings, the configuration can be purged by running:

sudo apt-get purge deja-dup

So there are three possible places where Deja Dup might be out of space, and I don't think its error message tells you which. There is a bug filed about that.

• You may have run out of space on the target partition (which it sounds like you didn't)
• You may have run out of space in your home directory (~/.cache/deja-dup can get large)
• You may have run out of space in /tmp