Install GIMP 2.9.1 in Linux Ubuntu / debian and Mint Using PPA

GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. GIMP works on many operating systems and it is translated in many languages. It has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc. GIMP is expandable and extensible. It is written and developed under X11 on UNIX platforms. Both stable and development version is available via 3rd party repositories.

What’s in GIMP 2.9.1:

• the Lanczos 3 sampler (replaced by the new LoBlur samling method)
• Maximum RGB filter
• Color temperature correction: There is a new filter in the Colors menu that lets you correct the color temperature of your photos.
• Tile based computation and projection
• ICC v4 color profile conversion support
• GEGL based filters and plugins
• OpenCL-accelerated filters
• These filters do currently make use of the full power of your CPU/GPU hardware which results in accelerated computation: Gaussian Blur, Grey, Laplace, Motion Blur, Pixelize, Sobel, Threshold
• Multi-core CPU / GPU support
• More on-canvas previews: Gaussian and Motion Blur work on-canvas and also most of the Noise creation filters.
• Heavily improved scaling quality: No- and LoHalo-Samplers
• New tool: Unified transformation
• Lossless color space conversions
• A huge step for GIMP: 16/32 bit per channel support
• Bug fixes and translation updates

To Install GIMP 2.9.1 in Linux Ubuntu / debian and Mint Using PPA, open a new Terminal window and bash (get it?) in the following commands:

sudo add-apt-repository ppa:otto-kesselgulasch/gimp-edge
sudo apt-get update
sudo apt-get install gimp gimp-gmic gmic

Install Resynthesizer Plugin with following command (It is not from above PPA):
Terminal Command:

sudo apt-get install gimp-resynthesizer