Linux on z Systems


Linux is a registered trademark of Linus Torvalds in the United States, other countries, or both.

Within this web page, 'Linux on System z' and 'Linux on z Systems'  are used synonymously to refer to Linux running on an IBM mainframe system.

What is Linux ?

Linux is an operating system whose kernel was developed by Linus Torvalds and initially distributed in 1991. Linux has evolved to become a widely accepted operating system with a wealth of applications. Today, many Linux distributions also contain a variety of tools and utilities provided by the open source community (e.g., from the GNU project). Linux is platform-independent and executes on many architectures, including IBM z Systems™, IBM Power Systems™, Intel®, Alpha®, or Sparc®. Linux is Open Source software which means that the source code may be downloaded free of charge. You can learn more about Open Source on

Although the source code is free, only system programmers build their own distributions. For production purposes, Linux distributions built by Linux distribution partners are used.

What is Linux on z Systems ?

Linux on z Systems is the synonym for Linux running on any IBM mainframe, including:

Linux on z Systems exploits the strengths and reliability features of the z Systems hardware, while preserving the openness and stability of Linux.
For more information refer to the Linux on z Systems homepage at:

Linux on z Systems distributions are offered by Linux distribution partners (Red Hat and SUSE) who provide services and support.
IBM offers consulting services, defect and remote technical support for all eligible generally available distributions of Linux for z Systems.
For more information, please contact your IBM representative or business partner or call 1-800-426-4968 (U.S.) or the appropriate IBM number in your region.

Why developerWorks pages for Linux on z Systems ?

These pages are provided to describe Linux on z Systems functionality for system programmers. Some of the information is useful for users of Linux on z Systems distributions.

Contact the IBM team

If you want to contact the Linux on z Systems IBM team refer to the Contact the Linux on z Systems IBM team page.

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