GIMP was initially designed for GNU/Linux, and most of its developers work on this operating system. Therefore, installing it on this system is especially easy. Moreover, the main GNU/Linux distributions provide automated tools for installing GIMP (if it’s not already installed by default). Of course, if your distribution was installed some months ago, and you do not regularly update it, most likely the version of GIMP on your system is not the latest one (i.e., 2.8), so you need to update your software. In most cases, simply updating your installation is enough.
With Debian, the simple command
apt-get install gimp
run as the
root user installs GIMP and all its dependencies. But installing some additional packages can ...