Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

OS X‘s Time Machine backup system has an API that let application developers indicate that certain folders belonging to the application should be excluded from the user‘s backup. This is done through an extended attribute set on the directory in the file system.

With the mission statement “[…] [Déjà Dup] hides the complexity of doing backups […]” I kind of expect there to be such a thing. As an application’s developer should be well suited to know what folders are safe to exclude. But I cannot find any mention of it online.

Nudges in the right direction or to the right feature request would be appreciated.

share|improve this question
up vote 3 down vote accepted

Déjà Dup will ignore any files in ~/.cache. So if you're asking because you have cache files, put them in ~/.cache/program-name/. See the XDG basedir spec for more information.

You could also forcibly add folders to the user's exclude-list key in the org.gnome.DejaDup gsettings schema. That's not very user-friendly (that key is designed only for users to modify), but it's a last resort.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.