Linux

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Introduction
Operating system
Linux
Linux distribution
Desktop Linux
Distributions
Ubuntu
Debian
Fedora
Mandriva Linux
Slackware
Knoppix
Arch Linux
Gentoo Linux
SUSE Linux distributions
CentOS
Damn Small Linux
List of Linux distributions
Desktop Environments
GNOME
KDE
Xfce
Enlightenment
X Window System
More About Linux
Linus Torvalds
History of Linux
Linux kernel
GNU/Linux naming controversy
Linux adoption
Embedded Linux
Linux devices
Android (operating system)
More About Free Software
Free software
Free and open source software
Richard Stallman
GNU Project
GNU General Public License
GNU Lesser General Public License
Free Software Foundation
File system
Command-line interface
Kernel (computer science)
Graphical user interface