Ubuntu 16.04 built-in back-up app (Deja-Dup) won't work

Question

Just installed Ubuntu 16.04 and tried to activate the automatic back-up option with the built-in back-up software. When trying to run a back up, it says: Failed to execute child process "duplicity" (No such file or directory). What's going on?

Answer 1

Run:

sudo apt-get install duplicity

This should fix that.

Answer 2

If sudo apt-get install duplicity doesn't work, run:

apt-cache policy deja-dup-backend-gvfs

If it says Installed: (none), run:

sudo apt-get install deja-dup-backend-gvfs

This worked for me in Ubuntu 16.10.