Alternatives to Photoshop and Illustrator [duplicate]

Solution 1:

In Open Source realm, you can find many alternatives to what you want. I just want to point for something, don't ever treat applications as if they are the same, You can't find SAME alternative for Photoshop, instead you can find mostly all properties and maybe sometimes more but you have to learn how to use.

Photoshop alternatives:

• gimp

  sudo apt-get install gimp
  

• krita

  sudo add-apt-repository ppa:kubuntu-ppa/backports 
  sudo apt-get update 
  sudo apt-get install krita
  

For more options take a look: http://www.ubuntufree.com/top-5-photoshop-alternatives-on-ubuntu-14-04-and-14-10/

Illustrator Alternatives:

The best to use would be inkscape:

sudo apt-get install inkscape