The open source operating system that runs the world.
Introduction Cloud providers must support a great variety of hardware to support the customer needs. This includes hardware that might not behave as the back-end virtualization technology expects it to, sometimes leading to problems in the created virtual machine (VM) or guest. QEMU allows the guests to use any Small Computer System Interface (SCSI) storage of the host by using two distinct paravirtualization backends that provides what it is called SCSI pass-through. The first one is virtio-blk. In this mode, available in all hypervisors, the guest uses the real storage device as a block device just to read and write…
Oct 09, 2018
DatabasesInfrastructure+
Tutorial
Learn Linux, 101: Hard disk layout
Learn Linux, 101: A roadmap for LPIC-1
Series
Learn Linux 101
Learn Linux, 101: Configure hardware settings
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Featured | Tutorial
Sep 22, 2018
DatabasesIBM Power Systems+
The cx_Oracle and node-oracledb modules provide an easy way to connect to an Oracle database running on any platform.
LinuxSystems
Kernel live patching is a framework that allows to fix kernel implementation bugs on a live system running critical workloads by replacing a buggy code with a fixed version, without incurring any downtime and thus increasing system and application availability to the customers.
Article
Jun 13, 2019
IBM Power SystemsLinux+
In this article, we have tried to assess the benefit of GPU offloading using OpenMP on memory and compute-intensive applications on an IBM Power AC922 server with four NVIDIA Tesla V100 GPUs with 16 GB memory each. We used memory-intensive triad code and compute-intensive matrix multiplication GPU offloaded OpenMP programs.
Blog
Jun 11, 2019
Linux
In case you have not seen, IBM and Red Hat have announced the intent to come together to be the pre-eminent contributor to and provider of open source software.
May 13, 2019
This article provides a way to implement a kernel module on Linux, compile it, and explore ways in which a user application can monitor and communicate with this kernel module.
Apr 29, 2019
IBM OpenPOWER servers support secure boot of system firmware to ensure the system boots only authorized firmware. When the system boots, each firmware component is verified against a cryptographic signature and integrity-checked against a secure hash of the component. If any check fails, secure boot prevents the system from booting…
Apr 26, 2019
IBM OpenPOWER servers provide a firmware level security feature known as Trusted Boot. Trusted Boot helps defend against a boot code cyberattack by helping to verify that your server is running only authorized firmware.
Apr 11, 2019
CloudContainers+
This learning path is comprised of basic to advanced Kubernetes skills.
Apr 02, 2019
DatabasesIBM LinuxONE+
Learn how you can optimize an open source PostgreSQL database when implementing on Linux on IBM Z.
Apr 01, 2019
In this tutorial, learn about TCP/IP network fundamentals for your Linux system.
Mar 21, 2019
ContainersDocker+
Learn Linux basic concepts and commands to start working with containers.
Mar 19, 2019
Artificial intelligenceCloud+
Learn how IBM has played, and continues to play, a leading role in the evolution of open source and how we leverage that leadership to deliver world-class offerings and solutions that benefit our customers.
Feb 28, 2019
CloudCloud Native+
With the announcement of containerd's CNCF graduation, what will this mean for developers and end users?
Feb 25, 2019
IBM LinuxONEIBM Z+
Meet the longboard twins, two teenagers who stepped up to a challenge by IBM engineers in the Netherlands toto streamline the ordering process for a skateboard website using a CICS on IBM z/OS backend and sample data provided by IBM.
Feb 21, 2019
Learn about the Linux perf command and how it can provide the same capabilities as OProfile tools, and much more
Feb 14, 2019
This article enables you to discover numerous tools for porting and tuning applications for Linux on Power- an integrated development environment (IDE), compilers and toolchains, performance and utilization analysis, emulation, instruction timing, high-performance application programming interfaces, and libraries.
Feb 13, 2019
AnalyticsArtificial intelligence+
Peek behind the curtain of any new innovation, and you’ll likely find a foundation built on open source contributions.
IBM AIXIBM Power Systems+
The IBM POWER9 processor has several features when compared to previous generation IBM POWER processors. One such feature is the nest performance monitoring units (pmu) that enable precise measurement of socket level resource utilization such as Memory bandwidth, SMP inter-connect bandwidth, CAPP or NVLink bandwidth. This article introduces nest pmu…
Feb 09, 2019
CloudIBM LinuxONE+
Give your apps the security, resilience, and scalability necessary to withstand the challenges of a disaster.
Feb 08, 2019
BlockchainHyperledger Fabric+
This tutorial provides guidance on how to establish connectivity between Hyperledger Fabric and Oracle Database using the node-oracledb and cx_Oracle modules and thus induce a sense of trust and reliability while modernizing enterprise businesses.
Code Pattern
Jan 30, 2019
API ManagementArtificial intelligence+
Node.js and IBM Watson Assistant with IBM LinuxONE Systems: A cognitive application with IBM Cloud Private.
Jan 04, 2019
Get answers to your questions about little endian and Linux on IBM Power Systems in this FAQ
Jan 03, 2019
In this tutorial, learn to install and configure X11 for your Linux system
Dec 28, 2018
This article demonstrates how Perf annotate can be used to analyze performance details alongside actual code with their assembly instructions. It also describes how the new cross-architecture annotation can be used to analyze recorded profile on different architecture, for example, record data on IBM PowerPC server and annotate on your…
Kernel-based virtual machine (KVM) virtualization has largely replaced Xen as the default open source mechanism for creating and supporting virtual machines (VMs) on most Linux systems. Though the motivation for this change is primarily build and support related rather than technical, the reality is that many enterprise IT groups that…
Dec 19, 2018
IBM Cloud PrivateIBM LinuxONE+
In this code pattern, you will build and deploy a crypto dashboard with IBM Cloud private running in the LinuxONE Community Cloud.
Dec 10, 2018
This tutorial explains InfiniBand bonding with SR-IOV physical and virtual functions. It describes how you can set up the bonding on the host and KVM-based guest systems running Red Hat Enterprise Linux (RHEL) operating system on an IBM POWER9 processor-based system.
Dec 06, 2018
KubeCon is coming up! Find relevant sessions and meet the team behind the IBM Cloud Kubernetes Service.
Nov 28, 2018
This tutorial introduces you to the Linux splat for IBM Power Systems, which provides a system-wide view of the different locks that were acquired, released, or actively held by different processes across the Linux system.
Nov 27, 2018
IBM Power SystemsInfrastructure+
This article provides the resources to facilitate standard operating systems and network protocols on IBM's leadership supercomputing hardware.
Nov 20, 2018
This tutorial explains how to set up an x86 system to build and package software to run on an IBM POWER processor-based system running the Linux operating system.
Nov 06, 2018
This article explain techniques to optimize user code using compiler information or runtime information through the auxiliary vector.
Nov 01, 2018
BlockchainContainers+
Learn how to enable TLS for key communications between the nodes of a Hyperledger Fabric network deployed in a Kubernetes cluster.
Oct 16, 2018
Artificial intelligenceIBM PowerAI+
An end-to-end tour using a computer vision classification example with Watson Machine Learning Accelerator.
Sep 28, 2018
DatabasesIBM AIX+
This article explains how to migrate an IBM DB2 database from Linux (little endian) to IBM AIX (big endian)
Tech Talks
Get the facts on sysdig and tips for your Call for Code submission
Sep 25, 2018
This article describes a simple custom script that uses this Ping utility to monitor the availability of a list of IT resources (that support ICMP packets) by polling their IP addresses at a regular frequency. Their ping statuses are captured as events and are notified as email, SMS, and slack…
Sep 19, 2018
The task scheduler is a key part of any operating system, and Linux continues to evolve and innovate in this area. In kernel 2.6.23, the Completely Fair Scheduler (CFS) was introduced. This scheduler, instead of relying on run queues, uses a red-black tree implementation for task management. Explore the ideas…
Sep 18, 2018
As a Linux administrator, you may encounter rootfs errors like "cannot mount rootfs" and "kernel panic" when you try to reboot a server after attaching volumes from external storage or even after installing a new Linux operating system. This article outlines the Linux booting process on an x86 platform, shows…
Sep 16, 2018
Learn how to integrate inotify into your own applications, and discover a set of command-line tools you can use to further automate system administration.
Aug 20, 2018
IBM LinuxONELinux
Linux system calls - we use them every day. But do you know how a system call is performed from user-space to the kernel? Explore the Linux system call interface (SCI), learn how to add new system calls (and alternatives for doing so), and discover utilities related to the SCI.…
Artificial intelligenceIBM Power Systems+
Neural nets may be the future of computing. A good way to understand them is with a puzzle that neural nets can be used to solve. Suppose that you are given 500 characters of code that you know to be C, C++, Java, or Python. Now, construct a program that…
Scylla is an open source NoSQL database that is compatible with Apache Cassandra. Scylla offers several key advantages over Cassandra such as scalability and better performance. Scylla was tested with IBM POWER8 processor-based servers and superior throughput was achieved with both database read and write operations. This article describes the…
Aug 17, 2018
LinuxPython+
Python 2.2 introduces a new construct accompanied by a new keyword. The construct is generators; the keyword is yield. Generators make possible several new, powerful, and expressive programming idioms, but are also a little bit hard to get one's mind around at first glance. In this article, David provides a…
AnalyticsApache Hadoop+
Qlik Sense is a business intelligence tool that allows data to be discovered and visualized. Qlik Sense supports Hadoop environments as a data source. Read this article for details about how Qlik Sense was tested to integrate with and visualize data in Hortonworks Data Platform (HDP) on IBM POWER8.
The Yocto Project is an open source project formed with the goal of making embedded Linux development easier and more portable across architectures. This article introduces the project and provides a step-by-step walk through on how to get started.
Aug 16, 2018
Although users usually think of Python as a procedural and object-oriented language, it actually contains everything you need for a completely functional approach to programming. This article discusses general concepts of functional programming, and illustrates ways of implementing functional techniques in Python.
API ManagementLinux+
Learning how to use the API for OpenSSL -- the best-known open library for secure communication -- can be intimidating, because the documentation is incomplete. Fill in the gaps, and tame the API, with the tips in this article. After setting up a basic connection, see how to use OpenSSL's…
Porting from Linux on x86 to Linux on Power is usually easy, but developers should be aware of differences that may manifest as compilation, linking, or run-time errors, or performance issues. This article lists those differences, and describes approaches for fixing, improving, or working around them. Awareness of these differences…
May 11, 2018
In this article, you can learn to configure Redundant Array of Independent Disks (RAID) volumes before installing Linux OS on IBM Power System S822LC servers. The article also describes how to protect data on internal disks in an enterprise deployment and achieve high availability and uninterrupted service.
Apr 20, 2018
IBM Power SystemsJava+
This article discusses some of the best practices to achieve best performance from applications running in the Liberty profile of the IBM WebSphere Application Server on the IBM Power System S9xx and L922 systems recently made available from IBM
Mar 22, 2018
This article describes the changes to the IBM Power Architecture that can be used to provide enhanced protection of virtual machines from other software running on the same system. A new higher privilege mode called Ultravisor mode is being introduced, along with the concept of secure virtual machines (SVMs). This…
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