Anyone can download Unix via the Internet without charge.

This sets Unix apart from proprietary operating systems like Microsoft Windows.

Many different versions of Unix are available for download, including FreeBSD, OpenBSD, Ubuntu Linux, Red Hat Linux, Fedora, Debian Linux, and Solaris.

Download FreeBSD Unix

FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon 64 and EM64T), Alpha / AXP, IA-64, PC-98 and UltraSPARC architectures. FreeBSD is derived from BSD, the version of Unix developed at the University of California, Berkeley.

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Download OpenBSD Unix

The OpenBSD project produces a free, multi-platform based on T. 4.4BSD UNIX operating system. Our efforts emphasize portability, standardization, correctness, proactive security and integrated cryptography. OpenBSD supports binary emulation of most programs from SVR4 (Solaris), FreeBSD, Linux, BSD / OS, SunOS and HP-UX.

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Download Solaris Unix

The cornerstone of the Sun is offering the system of enterprise-class Solaris Operating System (OS), the # 1 UNIX environment. Solaris provides the cutting edge of innovation with scalability, availability, performance, and security on SPARC, AMD Opteron and Intel Xeon-based systems. Companies can rely on the stability, high quality Solaris foundation to develop, deliver and manage critical and mission-critical services for peace of mind that the OS is fully compensated, and that applications are certified Solaris guaranteed to run on all new versions of Solaris. The Solaris 10 OS – the latest version of the first operating system – to reduce the complexity, costs and risks associated with today’s diverse IT environments through a number of new technologies. With over 600 new features, including Predictive Self-Healing and Dynamic Tracing capabilities, Solaris ZFS (Zettabyte file system) management, Solaris Containers (formerly N1 Grid Containers) technology, and furthermore, the operating system Solaris 10 gives organizations the tools and technologies quickly and confidently create infrastructure. In fact, the same operating system Solaris 10 integrates the most popular open source software and applications, including Apache, Tomcat, Samba, and Secure Shell. Many open source applications are compiled, tested and ready to run on the Solaris platform, reducing deployment time.

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Download Fedora Linux

The goal of The Fedora Project is to work with the Linux community to build one, general purpose operating system exclusively from free software. The development is in a public forum. The project will be based on the time to produce releases of Fedora Core about 2-3 times a year with a release schedule. The engineering team of Red Hat will continue to participate in building Fedora Core and invite and encourage more participation from outside is possible in Red Hat Linux. By using this more open process, Red Hat hopes to provide an operating system which uses practical development of free software and is more appealing to the open source community.

Fedora Linux Download

Download Debian Linux

Debian is an operating system (OS) on your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian uses the Linux kernel (the heart of an operating system), but most of the basic OS tools come from the GNU Project, hence the name GNU / Linux.

Debian GNU / Linux is much more than a pure OS: it comes with more than 8710 precompiled software packages delivered in a nice format for easy installation on your machine.

Debian Linux Download

Download Ubuntu Linux

Ubuntu is a community developed operating system that is perfect for laptops, desktops and servers. Whether you use it at home, at school or at work Ubuntu contains all the applications you need, from word processing and email applications, to Web server software and programming tools.

Ubuntu is and always will be free. You pay no license fees. You may download, use and share Ubuntu with your friends, family, school or business for absolutely nothing.

Download Ubuntu Linux

Gentoo Linux Download

Gentoo is a free operating system based on Linux or FreeBSD that can be automatically optimized and adapted for virtually any application or need. Extreme configuration, performance and a top-notch community of users and developers are features of the Gentoo experience.

Thanks to a technology called Portage, Gentoo can become an ideal secure server, development work, professional desktop, gaming system, embedded solution or something else – what you need it to be. Because of its virtually unlimited ability to adapt, Gentoo is often considered a metadistribution.

Download Gentoo Linux

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