Linux is a Unix-like and mostly POSIX-compliant computer operating system (OS) assembled under the model of free and open-source software development and distribution. The defining component of Linux is the Linux kernel, an operating system kernel first released on October 5, 1991 by Linus Torvalds. The Free Software Foundation uses the name GNU/Linux to describe the operating system, which has led to some controversy. Linux is the leading operating system on servers and other big iron systems such as mainframe computers and virtually all fastest supercomputers.

Linux Study Materials

Basic Linux Commands Here you can find some basic command prompt which is very useful for knowning the Linux.
User Guide Here you can find some important Linux user guide/ manual.
Online User Guide Here you can find some online Linux user guide/ manual.
Book Here you can find a complete e-Book on Linux.
e-Books Here you can find some more e-Books on Linux