Déjà Dup is a simple backup tool. It hides the complexity of backing up the Right Way (encrypted, off-site, and regular) and uses duplicity as the backend.It is available in ubuntu lucid repository;but the version in the repository is a bit old one.
At the time of writing this post,the version available in ubuntu lucid repository in version 14 whereas the present stable release in version 18.
To install it,you need to use deja-dup stable release ppa.
To install this,type the following in terminal:
sudo add-apt-repository ppa:deja-dup-team/ppasudo apt-get updatesudo apt-get install deja-dup
Edit:for some reason this is not working.as pointed in the comment,its an empty repository.will have to ask the developer what went wrong.meanwhile,please dont use it.