Unix is a trademarked operating system commonly used in Internet servers, workstations and PCs by Solaris, Intel, HP etc. Unix which developed in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others. Most UNIX systems are commercial in nature. UNIX is copyrighted name only big companies are allowed to use the UNIX copyright and name, so IBM AIX and Sun Solaris and HP-UX all are UNIX operating systems. The Open Group holds the UNIX trademark in trust for the industry and manages the UNIX trademark licensing program. In other hand today’s world, Linux is more famous than Unix but Unix has its own users. While Linux is an open source, free to use operating system widely used for computer hardware and software, game development, tablet PCS and mainframes.

Below are the significant difference between UNIX and LINUX.

Unix Linux
Costing Different flavors of Unix have different cost structures according to vendors. Linux is freely distributed, freely download-able, distributed through magazines, Books etc. There are priced versions for Linux also, but they are normally cheaper than Windows.
Development and Distribution Unix systems are divided into various other flavors, mostly developed by AT&T as well as various commercial vendors and non-profit organizations. Linux is developed by Open Source development i.e. through sharing and collaboration of code and features through forums etc and it is distributed by various vendors.
Manufacturer Three biggest distributions are Solaris (Oracle), AIX (IBM) & HP-UX Hewlett Packard. And Apple Makes OSX, a UNIX based os.. Linux kernel is developed by the community. Linus Torvalds oversees things.
User Unix operating systems were developed mainly for mainframes, servers and workstations except for OSX, Which is designed for everyone. The Unix environment and the client-server program model were essential elements in the development of the Internet Everyone. From home users to developers, sysadmins and computer enthusiasts alike.
Usage The UNIX operating system is used in internet servers, workstations & PCs. The backbone of the majority of financial infrastructure and many 24×365 high availability solutions. Linux can be installed on a wide variety of computer hardware, ranging from mobile phones, tablet computers and video game consoles, to mainframes and supercomputers.
File system support jfs, gpfs, hfs, hfs+, ufs, xfs, zfs format Ext2, Ext3, Ext4, Jfs, ReiserFS, Xfs, Btrfs, FAT, FAT32, NTFS
Text mode interface Originally the Bourne Shell. Now it’s compatible with many others including BASH, Korn & C. BASH (Bourne Again SHell) is the Linux default shell. It can support multiple command interpreters.
What is it? Unix is an operating system that is very popular in universities, companies, big enterprises etc. Linux is an example of Open Source software development and Free Operating System (OS).
GUI Initially Unix was a command based OS, but later a GUI was created called Common Desktop Environment. Most distributions now ship with Gnome. Linux typically provides two GUIs, KDE and Gnome. But there are millions of alternatives such as LXDE, Xfce, Unity, Mate, twm, etc.
Price Some free for development use (Solaris) but support is available for a price. Free but support is available for a price.
Security A rough estimate of UNIX viruses is between 85 -120 viruses reported till date. Linux has had about 60-100 viruses listed till date. None of them actively spreading nowadays.
Threat detection and solution Because of the proprietary nature of the original Unix, users have to wait for a while, to get the proper bug fixing patch. But these are not as common. In case of Linux, threat detection and solution is very fast, as Linux is mainly community driven and whenever any Linux user posts any kind of threat, several developers start working on it from different parts of the world
Processors x86/x64, Sparc, Power, Itanium, PA-RISC, PowerPC and many others. Dozens of different kinds.
Examples HP-UX, AIX, OS X, Solaris, All Linux Ubuntu, Fedora, Red Hat, Debian, Archlinux, Android etc.
Architectures is available on PA-RISC and Itanium machines. Solaris also available for x86/x64 based systems.OSX is PowerPC(10.0-10.5)/x86(10.4)/x64(10.5-10.8) Originally developed for Intel’s x86 hardware, ports available for over two dozen CPU types including ARM
Inception In 1969, it was developed by a group of AT&T employees at Bell Labs and Dennis Ritchie. It was written in “C” language and was designed to be a portable, multi-tasking and multi-user system in a time-sharing configuration. Inspired by MINIX (a Unix-like system) and eventually after adding many features of GUI, Drivers etc, Linus Torvalds developed the framework of the OS that became LINUX in 1992. The LINUX kernel was released on 17th September 1991

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