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Linux is a family of Unix-like operating systems and is an operating system kernel first released in September 1991, by Linus Torvalds is typically packaged in a Linux distribution. Moreover, variations of Linux comprise the Linux kernel and supporting libraries, most of which are provided by the GNU Project and many Linux distributions use the word "Linux" in its name, but the Free Software Foundation uses the name GNU/Linux to highlight the importance of GNU software.
Linux was designed for personal computers built on the Intel x86 architecture but later on, was built for more platforms than any other operating system and is the leading operating system on servers and other big iron systems such as mainframe, and the only OS used on TOP 500 supercomputers and as of today, it is employed by around 2.3 percent of desktop computers.
Red Hat Linux designed by Red Hat was a Linux distribution until its discontinuation in 2004 and was the first Linux distribution to accept the RPM Package Manager as packaging format and has worked as a starting point for numerous other distributions, such as Mandriva Linux and Yellow Dog Linux.
Ubuntu is an open-source operating system that works from the desktop to all your internet attached things and is a Linux distribution based on Debian. Moreover, it is officially published in three editions; desktop, server, and core for the internet of things devices and robots. All the versions can run on the computer, or in a virtual machine and is a general operating system for cloud computing, with support for OpenStack.
Unix is a multitasking computer OS from AT&T Unix, development started in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and colleagues. Unix was intended for the Bell System, then AT&T licensed Unix to outside companies in the late 1970s, leading to a variety of academic and commercial variants from vendors and the trademark passed to The Open Group, which allows the use of the mark for certified operating systems.