As you may know, Take a Break is a free, open-source application that forces the users to make pauses after a configurable work time.
You can configure the software to either notify you that it’s time for a break or to force you to quit what you are doing. When the “working time” has passed, the app changes the screen brightness level, rotates the screen upside down, locks the screen or just dislays a countdown message, depending on how you have configured its effect.
The latest version available is Take a Break 0.5.3, which brings small fixes only.
The latest Take a Break builds are available via some third party PPA, so installing the software on Ubuntu systems is easy.
All you need to do is add the PPA to your system, update the local repository index and install the takeabreak package:
$ sudo add-apt-repository ppa:vlijm/takeabreak
$ sudo apt-get update
$ sudo apt-get install takeabreak
Optional, to remove takeabreak, do:
$ sudo apt-get remove takeabreak
The installation instructions should work on Ubuntu 15.10 Wily Werewolf, Ubuntu 14.04 Trusty Tahr and derivative systems like Linux Mint 17.x and Elementary OS 0.3 Freya.