If you are looking for a rich features manipulation software for your Ubuntu, you should give Krita a try. Krita is a free and open source manipulation software for Linux. The new Krita 2.9 Beta 1 is now available for download. You can create your own pictures from scratch or you can also use and edit any existing images you already have. This tutorial is going to show you how to install Krita 2.9 Beta 1 on Ubuntu 14.04 and Ubuntu 14.10. Off course any other Linux distribution which based on Ubuntu also can use this tutorial to install Krita 2.9 Beta 1.
Before you go through the installation, you may want to read the release note for Krita 2.9. Use this link to get detailed information about new features, updates and bug fixes.
Steps to install Krita 2.9 Beta 1 on Ubuntu
Since its available through PPA, we need to set up the PPA for Krita on Ubuntu.
A. Add PPA Repository
sudo add-apt-repository ppa:dimula73/krita
B. Update local repository
sudo apt-get update
C. Install Krita
sudo apt-get install krita
Now you can start using Krita on your Ubuntu. Enjoy and have a nice day.