Introduction of Linux
What is Linux?
Linux is an operating system. Linux is a clone of
Unix Operating system but unlike many versions
of Unix, Most versions are free. Linux is
multitasking and multiuser operating system. Linux
is robust and scalable. Linux is stable. Linux is
growing in popularity. Linux is an open source as
most application are available free. Linux is secure.
History of Linux?
In 1991 Linux Torvalds (university of health sinki
in Finland) developed Linux kernel and it is freely
available to download.
Back in 1983 the free software foundation(F.S.S)
began developing open source software to create a
free Unix operating system that is GNU (GNU is
Around 1991 the GNU utilities where combined
with the Linux kernel.
Types of Linux?
A Linux distribution is a Precompiled and
Prepackaged version of Linux. It may offers certain
features and software application that other don't
have. For example: Red-hat, Debain, Suse, Gento,
Mandrake, Ubuntu, Linux mint etc.
A Linux clone is a Linux version based on a certain
distribution. For Example: Centos and Whitebox
enterprise Linux take Red-hat enterprise source and
Linux Vs Unix:
Linux is Unix like operating system.
Unix is the original.
Unix is broken down into system-V and Berkeley
Unix typically run on larger mini computers.
Whereas Linux is made for P.C and lower end
Principal of Unix:
Everything is a file.
Configuration file is stored in test file.
There are small programs that does one thing well
at a time and doesn't focus on extra features.
Programs can be chained together.