The Krita team has an official ppa ( named Krita Lime ). This ppa provides fresh versions of Krita for Linux Mint 17.3 , Ubuntu 14.04 LTS ( and Ubuntu-testing 15.10 ) and Elementary Freya 0.3 users.
To install Krita via this ppa, copy the code lines one by one ( Ctrl + C in your browser ) and paste them one by one in a terminal windows ( Ctrl + Shift + V ) then press enter.
Note: You can only install a single version of Krita on your system.
This is the last release of Krita, in the 2.9.x series.
sudo add-apt-repository ppa:dimula73/krita sudo apt-get update sudo apt-get install krita-2.9
Krita animation 2.9 beta
This is a popular beta release ( in progress ) with the features 'animation' and 'level of details'.
sudo add-apt-repository ppa:dimula73/krita sudo apt-get update sudo apt-get install krita-animation-testing