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Preview: IBM developerWorks : Linux

IBM developerWorks : Linux



The latest content from IBM developerWorks



Published: 25 Feb 2018 16:56:09 +0000

Copyright: Copyright 2004 IBM Corporation.
 



Learn Linux, 101: Manage printers and printing

06 Feb 2018 05:00:00 +0000

Learn how to manage print queues and user print jobs on Linux using CUPS and the LPD compatibility interface. Use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification or to learn for fun.



Tuned daemon profiles in Red Hat Enterprise Linux (RHEL) 7.x and CentOS 7.x

31 Jan 2018 05:00:00 +0000

This article describes the working of tuned daemon profiles on the Red Hat Enterprise Linux (RHEL) operating system version 7.x and CentOS version 7.x. It also describes the differences in the performance of tuned daemon profiles in the two operating systems.



Using N_Port ID Virtualization (NPIV) with kernel-based virtual machine (KVM) guests on IBM Power servers

08 Jan 2018 05:00:00 +0000

This article provides the basic steps to use N-Port ID Virtualization (NPIV) technology in a kernel-based virtual machine (KVM) guest. Additionally, the article also provides the significance of NPIV allowing multiple guests to make use of a single physical host bus adapter (HBA) to access multiple storage devices.



ISV solution ecosystem for Hortonworks on IBM Power Systems

05 Jan 2018 05:00:00 +0000

This article provides a list of ISV solutions that can augment the capabilities of Hortonworks Data Platform (HDP) running on Linux on IBM Power Systems. Solutions cover many categories including business intelligence (BI) tools, advanced analytics, and so on.



Learn Linux, 101: Mail transfer agent (MTA) basics

21 Dec 2017 05:00:00 +0000

Learn how to configure mail aliases and mail forwarding for the sendmail program on Linux. Learn about some alternative mail transfer agents. Use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification or to learn for fun.



QlikView integrated with Hortonworks Data Platform (HDP) running on IBM Power Systems

10 Dec 2017 05:00:00 +0000

QlikView is a business intelligence tool that allows data to be discovered and visualized. QlikView supports Hadoop environments as a data source. Read this article for details about how QlikView was tested to integrate with and visualize data in Hortonworks Data Platform (HDP) on IBM POWER8.



Tableau integrated with Hortonworks Data Platform (HDP) running on IBM Power Systems

09 Dec 2017 05:00:00 +0000

Tableau is a business intelligence tool that allows data to be discovered and visualized. Tableau supports Hadoop environments as a data source. Read this article for details about how Tableau Desktop was tested to integrate with and visualize data in Hortonworks Data Platform (HDP) on IBM POWER8.



vStorm Enterprise integrated with Hortonworks Data Platform (HDP) running on IBM Power Systems

08 Dec 2017 05:00:00 +0000

Veristorm vStorm Enterprise makes data migration to Hadoop environments flexible, secure and easy. vStorm already supports data movement to Hadoop solutions running on Linux on IBM Power Systems. Read this article for details about how vStorm was tested to integrate with and move data specifically to Hortonworks Data Platform (HDP) on IBM POWER8.



MicroStrategy integrated with Hortonworks Data Platform (HDP) running on IBM Power Systems

08 Dec 2017 05:00:00 +0000

MicroStrategy is a business intelligence tool that allows data to be explored and visualized. MicroStrategy supports Hadoop environments as a data source. Read this article for details about how MicroStrategy Desktop was tested to integrate with and visualize data in Hortonworks Data Platform (HDP) on IBM POWER8.



Learn Linux, 101: System logging

28 Nov 2017 05:00:00 +0000

Learn how to configure the syslog daemon on your Linux system and how to send log output to a central log server or accept log output as a central log server. Learn about the systemd journal subsystem and rsyslog and syslog-ng as alternative logging systems. Use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification or to learn for fun.



Creating a high availability setup for Linux on Power

07 Nov 2017 05:00:00 +0000

This article is about high availability or disaster recovery and fail-over for Linux on Power virtual machines (VMs) or logical partitions (LPARs). The solution works for all Linux distributions available for IBM POWER8 and later processor-based servers. Open source software used in this solution are: DRBD and heartbeat, which are available for all supported distributions. We have used Ubuntu v16.04, supported on IBM Power servers to explain and verify the solution.



Performance of Scylla running on IBM Power Systems

23 Oct 2017 04:00:00 +0000

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 and latency was achieved with both database read and write operations. This article describes the tests that were done with IBM POWER processor-based servers, the performance results, and the value of IBM POWER processor-based servers for Scylla.



Learn Linux, 101: Maintain system time

27 Sep 2017 04:00:00 +0000

Learn how to set your Linux system clock and synchronize your time with an Internet NTP time server. You can use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification or to learn for fun.



Enabling parallel Linux operating system deployment over a network on IBM PowerVM

21 Sep 2017 04:00:00 +0000

This article explains how you can perform or enable parallel Linux OS installation on IBM PowerVM logical partitions.



A deep dive into the new software-defined converged infrastructure for SAS Foundation mixed workloads

12 Sep 2017 04:00:00 +0000

This article describes the details behind the new software-defined converged infrastructure for deploying SAS Foundation Mixed Analytics workloads using IBM Elastic Storage Server (ESS), IBM Spectrum Scale, IBM POWER8, and Mellanox networking technology. This article documents detailed test configurations, test scenarios, performance results, and tuning options for the converged infrastructure. This article provides a methodology to tune each component in the infrastructure horizontally, as well as tuning the solution vertically, which allowed the optimal performance to be achieved.



SAP HANA and Hortonworks Data Platform (HDP) integration with SAP HANA Spark Controller running on IBM Power Systems

30 Aug 2017 04:00:00 +0000

This article describes how to set up an environment where SAP HANA accesses and analyzes data stored in Hortonworks Data Platform (HDP) using the SAP HANA Spark Controller. The environment is running entirely on IBM POWER8 processor-based servers. This article describes two deployment options that use either scale-up or scale-out POWER8 servers.



Setting up Apache OpenWhisk on IBM Power on a single-node, on-premises serverless framework

30 Aug 2017 04:00:00 +0000

OpenWhisk has significantly gained popularity as the cloud-first distributed event-based programming service. In this article, we discuss about the enablement of OpenWhisk for IBM Power servers. It also provides the configurations needed to start an OpenWhisk cluster in an all-in-one Ubuntu cluster running on IBM Power Architecture.



MongoDB backup and restore methodology using IBM Spectrum Protect for Linux on Power

08 Aug 2017 04:00:00 +0000

This article describes the approaches for backing up MongoDB instances on IBM Power Systems. It includes instructions on how to run backup and management agents on the MongoDB servers and how MongoDB can be integrated with traditional backup tools such as IBM Spectrum Protect.



Explore the OpenStack REST APIs for PowerVC

02 Aug 2017 04:00:00 +0000

IBM Power Virtualization Center (PowerVC) is an OpenStack-based IaaS cloud solution for the IBM Power platform designed to simplify the management of virtual resources. PowerVC consists of both a GUI and RESTful APIs that perform virtual management tasks for your Power System. This article highlights the REST APIs for both PowerVC Standard Edition and Cloud PowerVC Manager.



Learn Linux, 101: A roadmap for LPIC-1

31 Jul 2017 04:00:00 +0000

Use this roadmap to find IBM developerWorks tutorials that help you learn and review basic Linux tasks. And if you're also pursuing professional certification as a Linux system administrator, these tutorials can help you study for the Linux Professional Institute's LPIC-1: Linux Server Professional Certification exam 101 and exam 102. This roadmap is organized according to the 43 objectives in the 101 and 102 exams, which you are required to pass for LPIC-1 certification.



OpenPOWER GPU-enabled architecture performance enhancement using the Engineering and Scientific Subroutine Library (ESSL) drop-in acceleration

31 Jul 2017 04:00:00 +0000

This article illustrates the methodology to offload the part of computations to GPU without refactoring the applications. The Crossroads/NERSC-9 Memory Bandwidth benchmark is used to showcase the offload of dense matrix multiplication (DGEMM) computations on GPU by linking (compile time) the newer version of CUDA-enabled ESSL (IBM Scientific Library). The use of CUDA-enabled ESSL gives approximately six times performance gain over CPU-only code.



Learn Linux, 101: Localisation and internationalisation

21 Jul 2017 04:00:00 +0000

Learn how to use locale and time zone settings to put your Linux system in the right time and place. You can use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification or to learn for fun.



Put a Linux-based chess app on the cloud with Bluemix and IBM Containers

17 Jul 2017 04:00:00 +0000

Build a Docker container that uses WebSockets to expose an existing Linux CLI chess engine as a cloud service. This tutorial shows step-by-step the process for building a Docker container and deploying it as a running container on IBM Containers for Bluemix. It includes sample code and a JavaScript chess game that runs in a browser and illustrates how to consume the WebSocket-based service. You can apply the methods demonstrated to containerize almost any pipe-based Linux application and leverage them as cloud services on Bluemix.



SAS software with Hortonworks Data Platform (HDP) running on IBM POWER8

06 Jul 2017 04:00:00 +0000

This article describes how to set up an environment where SAS can access and analyze data stored on Hortonworks Data Platform (HDP) using SAS/ACCESS Interface to Hadoop. The environment is running on IBM POWER8 processor-based servers.



OpenPOWER firmware with Intelligent Platform Management Interface (IPMI) features

04 Jul 2017 04:00:00 +0000

This article explains the various OpenPOWER aspects (such as system firmware usage, controlling, and debugging) that are related to developers and test engineers.



Continuous monitoring of server resources utilization using custom scripts

21 Jun 2017 04:00:00 +0000

Monitoring IT infrastructure is essential to ensure its stability. Choosing an efficient, scalable, customizable, and light-weight solution for this has always been a challenge with changing requirements. Custom scripts can be used to achieve this smartly unlike the agent-based monitoring method in which all data defaulted by the monitoring tool used will be collected. This article describes the custom script method for monitoring system resources. In this method, the data collector(s) scripts running on data collector node will poll the target systems for data and so can decide on what data to be pulled.



Open Source POWER Availability Tool

20 Jun 2017 04:00:00 +0000

Search for Linux open source packages that run on the IBM POWER architecture.



OpenPOWER secure and trusted boot, Part 2: Protecting system firmware with OpenPOWER secure boot

05 Jun 2017 04:00:00 +0000

Protection of system firmware against malicious attack is paramount to server security. If an attacker is able to inject malicious code at the firmware level, no security measure at the operating system level can fully guarantee the trust of the system. 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 until the problem is corrected.



Learn Linux, 101: Maintain the integrity of filesystems

17 May 2017 04:00:00 +0000

Learn how to check the integrity of your Linux filesystems, monitor free space, and fix simple problems. Use the material in this tutorial to study for the Linux Professional Institute (LPI) 101 exam for Linux system administrator certification -- or just to check your filesystems and keep them in good working order, especially after a system crash or power loss.



An open source solution for dockerizing STAF and LTP on IBM Power Systems

10 May 2017 04:00:00 +0000

STAF and LTP is a widely used regression test combination to validate the behavior of Linux kernel and glibc components. This article describes how to build a STAF and LTP Docker image. By using this image, you can create containers that test the Linux kernel and glibc components.



Digital Business Start trial offering for IBM Power Enterprise Systems using EnterpriseDB (EDB) Postgres Advanced Server

14 Apr 2017 04:00:00 +0000

This article describes how to quickly and easily install and configure EnterpriseDB Postgres Advanced Server with Linux on Power architecture, namely RHEL 7.2 LE. Although it is targeted towards customers who have eligible dark core resources on IBM Power Enterprise Servers, the installation instructions are valid for most IBM Power servers.



Best practices and basic evaluation benchmarks: IBM Power System S822LC for high-performance computing (HPC)

05 Apr 2017 04:00:00 +0000

This article is a quick reference guide for IBM Power System S822LC for high-performance computing (HPC) system users to set processor and GPU configuration to achieve best performance for GPU accelerated applications. Before running an application, users need to make sure that the system is performing to the best in terms of processor frequency and memory bandwidth, GPU compute capacity, and memory bandwidth.



Digital Business Start trial offer for IBM Power Enterprise Systems with Hortonworks Data Platform

04 Apr 2017 04:00:00 +0000

The Digital Business Start for Hortonworks Data Platform (HDP) trial offer is for customers who have IBM® Power Enterprise Servers in their environment and want to enable inactive cores and memory to deploy HDP on RHEL 7.2 LE. This guide walks you through the setup steps.



Digital Business Start trial offer for IBM Power Enterprise Systems using MongoDB

15 Mar 2017 04:00:00 +0000

The Digital Business Start trial offer is for customers who have IBM® Power Enterprise Servers in their environment and want to enable inactive cores and memory to deploy MongoDB on a Linux operating system (OS). This guide walks you through the setup steps.



Deploying an OpenStack-based private cloud and Hortonworks Data Platform (HDP) on a Linux on IBM Power Systems server

09 Mar 2017 05:00:00 +0000

This article describes private cloud deployment with OpenStack and Linux on IBM Power System LC servers that are running KVM. This article also explains the deployment of Hortonworks Data Platform (HDP) using OpenStack.



Getting started with Neo4j on IBM Power Systems running Linux

28 Feb 2017 05:00:00 +0000

Neo4j on IBM Power Systems running Linux is an ideal solution for managing big data workloads. In this article, you can learn how to install Neo4j and begin using it with your application and data set today.



Quantum computing for everyone, a programmer’s perspective

21 Feb 2017 05:00:00 +0000

About a week ago, IBM launched Quantum Experience. The cornerstone of this initiative is to make a real, working quantum computer available for anyone. This blog discusses Quantum Experience, gives the basics while trying to dwell as little as possible on Algebra or Physics and, at the end, we’ll build a simple algorithm and discuss the results.



vCPU hotplug and hotunplug using libvirt v2

20 Feb 2017 05:00:00 +0000

This article talks about how to perform a virtual processor (vCPU) hotplug/hotunplug operation using libvirt version 2 in a PPC64LE environment.



OpenPOWER secure and trusted boot, Part 1: Using trusted boot on IBM OpenPOWER servers

17 Feb 2017 05:00:00 +0000

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. Integrity of your firmware is vital to the security of your system. Trusted Boot works by taking measurements of the executable boot code as the server boots and recording these measurements to a dedicated hardware security module known as the Trusted Platform Module (TPM). Together with a process known as remote attestation, you can use the data in the TPM to verify the integrity of your server's boot code.



Installing CentOS 7.2 on IBM Power System S822LC for high-performance computing (HPC) with a USB device

17 Feb 2017 05:00:00 +0000

Use this article to install CentOS on an IBM Power System LC server with a USB device. This installation is specifically for installing CentOS on an IBM Power System (OpenPOWER) server.



Red Hat Virtualization (RHV) environment on IBM Power Systems

13 Feb 2017 05:00:00 +0000

This article describes how to install and configure RHV components based on RHEL 7.3 LE, on an IBM POWER8 host.



Learn Linux, 101: Configure hardware settings

09 Feb 2017 05:00:00 +0000

Learn how to set up your computer hardware for Linux and how to find information about your hardware via Linux commands and tools. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or to learn for fun.



Analyzing performance using perf annotate

01 Feb 2017 05:00:00 +0000

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 notebook or x86 system.



Get started with MongoDB on IBM Power Systems running Linux

23 Dec 2016 05:00:00 +0000

MongoDB on IBM Power Systems running Linux is an ideal solution for managing big data workloads. Learn how to install MongoDB and begin using it with your application and data set today.



Using Docker Swarm mode on OpenPOWER servers

21 Dec 2016 05:00:00 +0000

This article explains how to set up a Docker swarm cluster using the newly introduced Swarm mode feature of Docker Engine.



Vulnerability scanning of Docker images on OpenPOWER systems

21 Dec 2016 05:00:00 +0000

This article explains how to configure and set up Clair vulnerability scanner for Docker images on OpenPOWER servers.



Configuring flannel overlay network with VXLAN for Docker on IBM Power Systems servers

21 Dec 2016 05:00:00 +0000

This article explains how to setup flannel based overlay network for Docker containers on IBM Power servers.



Enforcing cluster-wide policies for a Kubernetes-based Docker cluster

21 Dec 2016 05:00:00 +0000

This article explains how cluster-level policies can be enforced for Kubernetes by using PodSecurityPolicy.



IBM Power Systems solution for EnterpriseDB Postgres Advanced Server

21 Oct 2016 04:00:00 +0000

This article describes the general installation and tuning of EnterpriseDB Postgres Advanced Server database on IBM Power Systems servers running Linux. IBM Power servers offer significant advantages compared to similar configurations of Intel Xeon processor-based systems (Broadwell).



Mesos and Kubernetes on a hybrid (IBM Power and x86) architecture scenario

03 Oct 2016 04:00:00 +0000

In an actual production environment, our customers often have a complicated application running environment that includes a hybrid architecture, a hybrid distributed system, and so on. Also, our customers prefer a unified container cloud platform and always use Kubernetes as a framework of Mesos. This article can help you to set up Kubernetes on a Mesos cluster on a hybrid architecture.



Installing Ubuntu on an IBM Power System LC server

08 Sep 2016 04:00:00 +0000

Use this tutorial to install Ubuntu on an IBM Power System LC server using several different methods, including USB device, virtual wizard, or network boot installation. This installation is specifically for installing Ubuntu on an IBM Power System S812 LC or S822 LC (OpenPOWER) server, but can be easily adapted to a different Power System LC server.



Setting up a Mesos/Marathon cluster on RHEL 7.1 little endian

07 Sep 2016 04:00:00 +0000

This article describes the steps to set up a Mesos/Marathon cluster on OpenPOWER servers.



Manage your big data workloads with NoSQL solutions on IBM Power Systems running Linux

30 Aug 2016 04:00:00 +0000

Manage your big data workloads with NoSQL solutions, MongoDB and EnterpriseDB on IBM Power Systems running Linux.



Support multiple keyboard layouts in web-based VNC apps

23 Aug 2016 04:00:00 +0000

Take advantage of a recently introduced browser API (available in Chrome, Firefox, and Opera) to add support for multiple keyboard layouts to web-based VNC clients.



Linux server hardening and security verification

17 Aug 2016 04:00:00 +0000

In a world where securing your computer systems is more difficult than ever, there are steps you can take to protect them. This article includes tips and tools to help you harden and secure your Linux servers by using processes such as sane configurations, fuzz testing and penetration testing.



Managing docker containers with orchestration

03 Aug 2016 04:00:00 +0000

Docker is a tool for deploying, executing and managing containers. This article provides links to Linux on Power Systems Docker binaries and the steps to install them.



Get started with EDB Postgres Advanced Server 9.5 on IBM Power Systems running Linux

03 Aug 2016 04:00:00 +0000

EnterpriseDB EDB Postgres Advanced Server 9.5 on IBM Power Systems running Linux is an ideal solution for managing business critical workloads. Learn how to install Postgres Advanced Server 9.5 and begin by using it with your application and data set today.



Using docker containers networks

03 Aug 2016 04:00:00 +0000

To build web applications that act in concert securely, use the docker networks feature. Networks, by definition, provide complete isolation for containers. Hence, it is important to have control on the networks that your applications run on. Docker container networks give you that control. The following article describes describes the type of networks that the docker engine creates by default and shows you how to create your own, user-defined networks.



Machine Learning, Deep Learning 101

20 Jul 2016 04:00:00 +0000

This article describes the growing relevance of Machine Learning used in various kinds of analytics along with an overview of Deep Learning. It provides an end-to-end process for using Machine Learning and Deep Learning and the options for getting started on IBM® Power Systems™.



Learn Linux, 101: Create, monitor, and kill processes

12 Jul 2016 04:00:00 +0000

Learn about process management on Linux: how to shuffle processes between foreground and background, find out what's running, kill processes, keep processes running after you've left for the day, and multitask in a terminal window. You can use the material in this tutorial to study for the Linux Professional Institute LPIC-1: Linux Server Professional Certification exam 101, or just to learn for fun.



Set up a docker private registry with basic HTTP authentication support

08 Jul 2016 04:00:00 +0000

Learn how to set up a docker private registry with TLS and HTTP authentication on an OpenPower server running Red Hat Enterprise Linux (RHEL) 7.1 LE.



Tuning guide for MongoDB on IBM Power Systems

24 Jun 2016 04:00:00 +0000

This tuning guide will help you achieve optimal performance when running MongoDB on IBM Power Systems by providing guidelines for system-level, virtualization-level and application-level tuning.



Little endian and Linux on IBM Power Systems

16 Jun 2016 04:00:00 +0000

IBM Linux on Power Chief Engineer, Jeff Scheel, answers your questions about little endian and Linux on IBM Power Systems in this FAQ



Quick start guide to Apache Bigtop v1.1 on IBM SoftLayer OpenPOWER with Ubuntu 14.04

01 Jun 2016 04:00:00 +0000

This article outlines the process of installing the Apache Hadoop and Spark Bigtop v1.1.0 bundle on an IBM® SoftLayer® POWER8® bare metal server running Ubuntu 14.04. Apache Zeppelin notebook is included in the bundled installation script to run an initial benchmark suite.



Building Boost libraries using the xlcpp toolset for IBM compilers on Linux

22 Apr 2016 04:00:00 +0000

This article introduces the procedures to build Boost libraries with Boost build engine, b2/bjam, using the new xlcpp toolset of IBM XL compilers for Linux on little endian systems. The target audience is software engineers interested in increasing productivity and quality of C++ applications by using the expertly designed Boost libraries. This is important for the development of high-quality applications, where the project requirements exceed the extent of features provided by the C++ standard libraries.



Learn Linux, 101: Automate system administration tasks by scheduling jobs

29 Mar 2016 04:00:00 +0000

Learn how to run the same job every day, week, or month. And learn how to schedule a single job when system usage is low, or when you would ratherspend your time in other ways. You can use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification or to learn for fun.



Learn Linux, 101: Manage user and group accounts and related system files

21 Mar 2016 04:00:00 +0000

Learn how to manage user and group accounts and the related system files. You can use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification, or to learn for fun.



Learn Linux, 101: File and directory management

21 Mar 2016 04:00:00 +0000

You've probably heard that everything in Linux is a file, so start on the right path with a solid grounding in file and directory management: finding, listing, moving, copying, and archiving. Use the material in this tutorial to study for the Linux Professional Institute LPIC-1: Linux Server Professional Certification exam 101, or just to learn for fun.



Learn Linux, 101: Text streams and filters

21 Mar 2016 04:00:00 +0000

There's a lot more to text manipulation than cut and paste, particularly when you aren't using a GUI. In this tutorial, Ian Shields introduces you to text manipulation on Linux using filters from the GNU textutils package. By the end of this tutorial, you will be manipulating text like an expert. Use the material in this tutorial to study for the Linux Professional Institute LPIC-1: Linux Server Professional Certification exam 101, or just to learn for fun.



Get started with IBM Power Virtualization Center (PowerVC)

09 Mar 2016 05:00:00 +0000

Virtualization plays a key role in cloud computing. IBM Power Virtualization Center (PowerVC) is a new virtualization management tool that's built on OpenStack and designed to simplify the management of virtual resources in Power Systems environments, and thus improve administrator productivity. In this tutorial, we'll cover fundamental concepts, installation, and basic configuration techniques, as well as ways to configure various resources like hosts, storage, and networks. We'll also take a look at virtual machines and images, and show you how to create and manage a VM using PowerVC with the help of screens.



Learn Linux, 101: Use basic SQL commands

24 Feb 2016 05:00:00 +0000

Learn how to query databases and manipulate data by using basic SQL commands. You can use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification, or to learn for fun.



Learn Linux, 101: Find and place system files

28 Jan 2016 05:00:00 +0000

Learn the correct location for files under the Filesystem Hierarchy Standard (FHS) on a Linux system and see how to find important files and commands. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to explore file organization and management.



Learn Linux, 101: Manage file permissions and ownership

27 Jan 2016 05:00:00 +0000

Learn to manage file ownership and permissions on your Linux filesystems. Learn about access modes such as suid, sgid, and the sticky bit and how to use them to enhance security. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to learn about file ownership, permissions, and security.



Learn Linux, 101: Create partitions and filesystems

27 Jan 2016 05:00:00 +0000

Learn how to create partitions on a disk drive and how to format them for use on a Linux system as swap or data space. Use the material in this tutorial to study for the Linux Professional Institute LPIC-1: Linux Server Professional Certification exam 101, or just to learn about partitions and Linux filesystems for your own use.



Learn Linux, 101: Create and change hard and symbolic links

27 Jan 2016 05:00:00 +0000

Learn how to create and manage hard and symbolic links to files on your Linux system. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to explore the differences between hard and soft, or symbolic, links and the best ways to link to files, as opposed to copying files.



Learn Linux, 101: Manage disk quotas

27 Jan 2016 05:00:00 +0000

Learn to set and check disk quotas on your Linux filesystems to prevent individual users from using more space than allowed and to prevent whole filesystems from filling up unexpectedly. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to learn about quotas.



Learn Linux, 101: Control mounting and unmounting of filesystems

27 Jan 2016 05:00:00 +0000

Learn to mount your Linux filesystems; configure and use removable USB, IEE 1394, or other devices; and properly access floppy disks, CDs, and DVDs. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to learn about accessing Linux filesystems.



Learn Linux, 101: Customize or write simple scripts

18 Jan 2016 05:00:00 +0000

Learn how to customize existing scripts or write simple new bash scripts using standard shell syntax, looping and control structures, and tests for success or failure. You can use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification, or to learn for fun.



Installing Red Hat Enterprise Linux 7.2 on IBM POWER8 and x86 in bare metal mode: A comparison

07 Jan 2016 05:00:00 +0000

This article can help administrators who need to install Red Hat Enterprise Linux on an IBM® POWER8™ processor-based system in bare metal mode by comparing the process of installation on an x86 system.



Learn Linux, 101: Search text files using regular expressions

31 Dec 2015 05:00:00 +0000

Learn how to use regular expressions, and then use them to find things in files on your filesystem. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to learn for fun.



Learn Linux, 101: The Linux command line

23 Dec 2015 05:00:00 +0000

GUIs are fine, but to unlock the real power of Linux, there's no substitute for the command line. In this tutorial, Ian Shields introduces you to some of the major features of the bash shell, with an emphasis on the features that are important for LPI certification. By the end of this tutorial, you will be comfortable using basic Linux commands like echo and exit, setting environment variables, and gathering system information. Use the material in this tutorial to study for the Linux Professional Institute LPIC-1: Linux Server Professional Certification exam 101, or just to learn for fun.



Learn Linux, 101: RPM and YUM package management

21 Dec 2015 05:00:00 +0000

Learn how to install, upgrade and manage packages on your Linux system. This tutorial focuses on the Red Hat Package Manager (RPM) developed by Red Hat, as well as the Yellowdog Updater Modified (YUM) originally developed to manage Red Hat Linux systems at Duke University's Physics department. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to explore the best ways to add new software and keep your system current.



Learn Linux, 101: Runlevels, boot targets, shutdown, and reboot

21 Dec 2015 05:00:00 +0000

Learn to shut down or reboot your Linux system, warn users that the system is going down, and switch to a more or less restrictive runlevel. You can use the material in this article to study for the LPIC-1: Linux Server Professional Certification, or just to learn about shutting down, rebooting, and changing runlevels. The material corresponds to the LPI April 2015 Version 4.0 objectives.



Learn Linux, 101: Customize and use the shell environment

12 Dec 2015 05:00:00 +0000

Learn how to customize your Linux shell environment and write simple bash functions. You can use the material in this tutorial to study for the LPI 102 exam for Linux system administrator certification, or to learn for fun.



IBM PurePower Integrated Manager: Updates and compliance considerations

07 Dec 2015 05:00:00 +0000

This article provides information about the Updates and Compliance function in IBM® PurePower Integrated Manager. You can learn about version compliance status, connection modes, and installation of firmware or software versions of components in an IBM PurePower System™.



Microservices in action, Part 2: Containers and microservices — a perfect pair

13 Nov 2015 05:00:00 +0000

Discover how Linux containers are revolutionizing software development and powering microservices to shift an entire industry. Know the requirements that are critical to success in microservices adoption and how container-based infrastructures make it easier to meet those requirements.



Performance of inline assembly: An analysis based on the computation of Fibonacci sequence

28 Oct 2015 04:00:00 +0000

Using the Fibonacci sequence computation as an example, this article analyzes the speed advantage of an inline assembly implementation in comparison to the performance of other programming techniques such as the recursive algorithm, the dynamic programming implementation, the iterative approach, and the optimized matrix power algorithm. The target audience is software engineers interested in further accelerating the execution of their applications by handcrafting the assembler codes for the most performance-critical sections.



Processor utilization difference between IBM AIX and Linux on Power – apple to apple comparison

15 Oct 2015 04:00:00 +0000

This article covers the case study to find the comparison between IBM AIX and Linux on Power processor utilization with the help of network workload. The article also explores why there is a considerable difference between the overall system-level processor utilization reported on the IBM Power hardware while running the same workload on AIX and Linux on Power platforms.



Core dump debugging for the IBM SDK for Node

30 Sep 2015 04:00:00 +0000

Debug Node application crashes and memory leaks with an Eclipse add-on that works alongside the IBM SDK for Node to help you diagnose core dumps.



Migrate a LAMP application to Bluemix

18 Sep 2015 04:00:00 +0000

Learn how to migrate a classic LAMP application (Drupal) to IBM Bluemix.



Learn Linux, 101: Boot the system

25 Aug 2015 04:00:00 +0000

Learn to guide your Linux system through the boot process. You can use the material in this tutorial to study for the LPIC-1 101 exam for Linux system administrator certification or just to learn about the boot process. The material corresponds to the LPI April 2015 Version 4.0 objectives.



Learn Linux, 101: Debian package management

24 Aug 2015 04:00:00 +0000

Learn how to install, upgrade, and manage packages on your Linux system. This tutorial focuses on the Advanced Packaging Tool, or APT, which is the package management system used by Debian and distributions derived from Debian, such as Ubuntu. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to explore the best ways to add new software and keep your system current.



Learn Linux, 101: Manage shared libraries

18 Aug 2015 04:00:00 +0000

Learn how to determine which shared libraries your Linux executable programs depend on and how to load them. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or just to learn for fun.



Learn Linux, 101: Install a boot manager

14 Aug 2015 04:00:00 +0000

Learn how to choose and configure a boot manager for your Linux system. You can use the material in this tutorial to study for the LPI 101 exam for Linux system administrator certification, or to learn for fun.



Learn Linux, 101: Hard disk layout

13 Aug 2015 04:00:00 +0000

Learn how to design a partition layout for disks on a Linux system. Use the material in this tutorial to study for the Linux Professional Institute LPIC-1: Linux Server Professional Certification exam 101, or to learn for fun.



Advanced features of inline assembly for Linux on z Systems

12 Aug 2015 04:00:00 +0000

The objective of this article is to discuss the advanced features of inline assembly supported by IBM XL compiler for Linux on z Systems. The target audience is software engineers who are interested in going beyond the extent of the optimizations provided by the compiler to fine tune the most performance-sensitive code section of their applications.



The basics of inline assembly for Linux on z Systems

12 Aug 2015 04:00:00 +0000

Inline assembly allows software engineers to handcraft the assembler codes for the most performance-sensitive parts of their programs. This feature unleashes the hardware advantage of IBM z Systems as well as programmer ingenuity to realize the development of high-performance applications. The objective of this article is to discuss the basics of inline assembly feature supported by IBM compiler for Linux on z Systems.



Improve the performance of function calls with OpenPOWER ABI

10 Jul 2015 04:00:00 +0000

This article is to explain what OpenPOWER application binary interface (ABI)introduces to improve performance of function call. Different from the 64-bit PowerPC ELF ABI Supplement 1.9 (ELF ABI v1), OpenPOWER ABI gets rid of function descriptor and doesn't require callers to initialize environment any more. Aligned with current industry practice, it makes the callees set up the TOC pointer in place, introduces dual entry to ensure the establishment as required, and uses trampoline to support lexical nesting function calls.



Optimization techniques for library functions using IBM PowerPC processors

09 Jul 2015 04:00:00 +0000

This article explains the various optimization techniques in power assembly so as to make applications run faster. Applying certain techniques in IBM® PowerPC® processor-specific applications improves the performance of the program. Some of the following techniques are now applied on Linux glibc string and memory functions and there is a significant amount of performance improvement. This article is intended for IBM AIX and Linux programmers who write assembly code for performance improvement in IBM Power Architecture.



OpenMP support in IBM XL compilers

29 Jun 2015 04:00:00 +0000

The IBM XL Fortran and XL C/C++ for Linux on Power little endian compilers support the OpenMP API V3.1 and some selected V4.0 features. This enables the compiler to use the multicore hardware to improve performance. This article describes the OpenMP features supported in the latest XL compilers. It also includes some examples to illustrate the benefits of using these new features.