Desktop Linux: Unveiled is a series of posts that show how to start using Linux.
In this post, Linux will be briefly explained and briefly compared to other common desktop computer operating systems.
First, what is an operating system?
An operating system (OS) is the software that makes a computer run, like Microsoft Windows, or MacOS. It is typically able to provide a way for users to operate the computer, and translate the instructions so the computer can run them. It also coordinates all the computer’s resources such as its CPU (central processing unit), memory, hard drive, and other components of the computer, as well as coordinate the user’s programs and data.
What is Linux?
Most people understand “Linux” to be a complete operating system like Windows or MacOS. However, strictly speaking, “Linux” is in fact just a part of the operating system, the central part called the kernel. Common usage has had “Linux” to informally refer to the whole operating system.
“Distributions”, (usually) complete and integrated collections of software built around the Linux kernel, can be legally built and distributed by anyone with the abilities and inclination because of the way the Linux kernel and the other software usually used with it are licensed, although most people choose to use an established distribution.
Distributions vs. Operating Systems
Linux distributions usually contain full linux-based operating systems, as well as extra software often not traditionally included in operating systems, such as office suites, media players, graphic design software, educational software, games, various apps, as well as other software such as server software. Although not all of the software is installed at the same time, they are typically all easily available in central locations called “repositories”, similar to app stores on MacOS and Windows; much is available free of charge, too!
Free Software vs. Proprietary Software
A lot of software available under Linux — and a growing amount under Windows and MacOS as well — is called Free Software, or sometimes Open Source Software. As a contrast, a substantial amount of Windows and MacOS software is called Proprietary Software.
Many people hear the expression “Free Software” and assume that it means that it is free of monetary charge. Some may even question its quality on the basis of such a lack of price.
Although free software is often (though not always) given away free of charge, and most common free software is of very high quality, the expression “Free Software” in fact refers to “freedom”, specifically various freedoms granted to the users of the software. These freedoms include the freedom to run the software for whatever purpose you wish, the freedom to study how the program works as well as make any changes that you wish, the freedom to share the software with others, and the freedom to share software you’ve modified with others.
Some of these freedoms require that the source code, or “recipes” that people can read and understand, be available to anyone and everyone.
The various licences used to allow this often tend to foster cooperation between various parties, often allowing groups who might sometimes be competitors to also cooperate with each other, creating common software that each group can then package together to present according to their own vision. Within this cooperation, software sometimes is developed quickly, and often many programming bugs are found and corrected quickly.
Some common free software licences are the GPL and the LGPL, which specifically give the recipient of the software the above freedoms, and require the sharing of the source code to the software, and any changes you may have made to it, when distributing the software. Other common free software licences are the BSD licence, the MIT licence, and the Apache licence, which have very few requirements but which permit users to use, modify, and distribute the software, while retaining copyright and some disclaimers notices.
In contrast, proprietary software is usually controlled by very restrictive licenses that keep the source code hidden, doesn’t allow users to distribute the software to whomever they please, doesn’t allow users to modify it or fix bugs even if they are able to were they to have access to the source code, and may even dictate how the software may or may not be used.
Next Chapter
Chapter 2 will list some popular Linux distributions that people use on their computers.