GIMP was originally released as the General Image Manipulation Program. In 1995 Spencer Kimball and Peter Mattis began developing GIMP as a semester-long project at the University of California, Berkeley. In 1996 GIMP (0.54) was released as the first publicly available release. In the following year Richard Stallman visited UC Berkeley where Spencer Kimball and Peter Mattis asked if they could change General to GNU (the name given to the operating system created by Stallman). Richard Stallman approved and the definition of the acronym GIMP was changed to be the GNU Image Manipulation Program. This reflected its new existence as being developed as Free Software as a part of the GNU Project.
The number of computer architectures and operating systems supported has expanded significantly since its first release. The first release supported UNIX systems, such as Linux, SGI IRIX and HP-UX. since the initial release, GIMP has been ported to many operating systems, including Microsoft Windows and OS X; the original port to the Windows 32-bit platform was started by Finnish programmer Tor M. Lillqvist in 1997 and was supported in the GIMP 1.1 release. for more information visit the Gimp Information more information and links.
1.) Update Your System.
Before you get started it is always best to make sure your system is up to date. Open up the Terminal (CTRL+ALT+t) and use this command to get started.
$ sudo apt-get update && sudo apt-get upgrade