What's New in SUSE® Linux Enterprise 11
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Mdns/Dns-Sd Tutorial
MDNS/DNS-SD TUTORIAL In this tutorial, we will describe how to use mDNS/DNS-SD on Raspberry Pi. mDNS/DNS-SD is a protocol for service discovery in a local area network. It is standardized under RFCs 6762 [1] and 6763[2]. The protocol is also known by the Bonjour trademark by Apple, or Zeroconf. On Linux, it is implemented in the avahi package. [1] http://tools.ietf.org/html/rfc6762 [2] http://tools.ietf.org/html/rfc6763 About mDNS/DNS-SD There are several freely available implementations of mDNS/DNS-SD: 1. avahi – Linux implementation (http://www.avahi.org/) 2. jmDNS – Java implementation (http://jmdns.sourceforge.net/) 3. Bonjour – MAC OS (installed by default) 4. Bonjour – Windows (https://support.apple.com/kb/DL999?locale=en_US) During this course, we will use only avahi. However, any of the aforementioned implementations are compatible. Avahi installation avahi is available as a package for Raspbian. Install it with: sudo apt-get install avahi-deamon avahi-utils Avahi usage avahi-daemon is the main process that takes care of proper operation of the protocol. It takes care of any configuration of the interfaces and network messaging. A user can control the deamon with command line utilities, or via D-Bus. In this document, we will describe the former option. For the latter one, please see http://www.avahi.org/wiki/Bindings. Publishing services avahi-publish-service is the command for publishing services. The syntax is: avahi-publish-service SERVICE-NAME _APPLICATION- PROTOCOL._TRANPOSRT-PROTOCOL PORT “DESCRIPTION” --sub SUBPROTOCOL For instance, the command: avahi-publish-service light _coap._udp 5683 “/mylight” --sub _floor1._sub._coap._udp will publish a service named ‘light’, which uses the CoAP protocol over UDP on port 5683. -
Using Replicated Execution for a More Secure and Reliable Web Browser
Using Replicated Execution for a More Secure and Reliable Web Browser Hui Xue Nathan Dautenhahn Samuel T. King University of Illinois at Urbana Champaign huixue2, dautenh1, kingst @uiuc.edu { } Abstract Unfortunately, hackers actively exploit these vulnerabil- ities as indicated in reports from the University of Wash- Modern web browsers are complex. They provide a ington [46], Microsoft [61], and Google [49, 48]. high-performance and rich computational environment Both industry and academia have improved the se- for web-based applications, but they are prone to nu- curity and reliability of web browsers. Current com- merous types of security vulnerabilities that attackers modity browsers make large strides towards improving actively exploit. However, because major browser plat- the security and reliability of plugins by using sandbox- forms differ in their implementations they rarely exhibit ing techniques to isolate plugins from the rest of the the same vulnerabilities. browser [62, 33]. However, these browsers still scatter In this paper we present Cocktail, a system that uses security logic throughout millions of lines of code, leav- three different off-the-shelf web browsers in parallel to ing these systems susceptible to browser-based attacks. provide replicated execution for withstanding browser- Current research efforts, like Tahoma [32], the OP web based attacks and improving browser reliability. Cock- browser [36], the Gazelle web browser [59], and the Illi- tail mirrors inputs to each replica and votes on browser nois Browser Operating System [58] all propose build- states and outputs to detect potential attacks, while con- ing new web browsers to improve security. Although tinuing to run. -
Real-Time Performance During CUDA™ a Demonstration and Analysis of Redhawk™ CUDA RT Optimizations
A Concurrent Real-Time White Paper 2881 Gateway Drive Pompano Beach, FL 33069 (954) 974-1700 real-time.ccur.com Real-Time Performance During CUDA™ A Demonstration and Analysis of RedHawk™ CUDA RT Optimizations By: Concurrent Real-Time Linux® Development Team November 2010 Overview There are many challenges to creating a real-time Linux distribution that provides guaranteed low process-dispatch latencies and minimal process run-time jitter. Concurrent Computer Corporation’s RedHawk Linux distribution meets and exceeds these challenges, providing a hard real-time environment on many qualified hardware configurations, even in the presence of a heavy system load. However, there are additional challenges faced when guaranteeing real-time performance of processes while CUDA applications are simultaneously running on the system. The proprietary CUDA driver supplied by NVIDIA® frequently makes demands upon kernel resources that can dramatically impact real-time performance. This paper discusses a demonstration application developed by Concurrent to illustrate that RedHawk Linux kernel optimizations allow hard real-time performance guarantees to be preserved even while demanding CUDA applications are running. The test results will show how RedHawk performance compares to CentOS performance running the same application. The design and implementation details of the demonstration application are also discussed in this paper. Demonstration This demonstration features two selectable real-time test modes: 1. Jitter Mode: measure and graph the run-time jitter of a real-time process 2. PDL Mode: measure and graph the process-dispatch latency of a real-time process While the demonstration is running, it is possible to switch between these different modes at any time. -
State of Linux Audio in 2009 Linux Plumbers Conference 2009
State of Linux Audio in 2009 Linux Plumbers Conference 2009 Lennart Poettering [email protected] September 2009 Lennart Poettering State of Linux Audio in 2009 Who Am I? Software Engineer at Red Hat, Inc. Developer of PulseAudio, Avahi and a few other Free Software projects http://0pointer.de/lennart/ [email protected] IRC: mezcalero Lennart Poettering State of Linux Audio in 2009 Perspective Lennart Poettering State of Linux Audio in 2009 So, what happened since last LPC? Lennart Poettering State of Linux Audio in 2009 RIP: EsounD is officially gone. Lennart Poettering State of Linux Audio in 2009 (at least on Fedora) RIP: OSS is officially gone. Lennart Poettering State of Linux Audio in 2009 RIP: OSS is officially gone. (at least on Fedora) Lennart Poettering State of Linux Audio in 2009 Audio API Guide http://0pointer.de/blog/projects/guide-to-sound-apis Lennart Poettering State of Linux Audio in 2009 We also make use of high-resolution timers on the desktop by default. We now use realtime scheduling on the desktop by default. Lennart Poettering State of Linux Audio in 2009 We now use realtime scheduling on the desktop by default. We also make use of high-resolution timers on the desktop by default. Lennart Poettering State of Linux Audio in 2009 2s Buffers Lennart Poettering State of Linux Audio in 2009 Mixer abstraction? Due to user-friendliness, i18n, meta data (icons, ...) We moved a couple of things into the audio server: Timer-based audio scheduling; mixing; flat volume/volume range and granularity extension; integration of volume sliders; mixer abstraction; monitoring Lennart Poettering State of Linux Audio in 2009 We moved a couple of things into the audio server: Timer-based audio scheduling; mixing; flat volume/volume range and granularity extension; integration of volume sliders; mixer abstraction; monitoring Mixer abstraction? Due to user-friendliness, i18n, meta data (icons, ...) Lennart Poettering State of Linux Audio in 2009 udev integration: meta data, by-path/by-id/.. -
Best Practices and Getting Started Guide for Oracle on IBM Linuxone
Front cover Best practices and Getting Started Guide for Oracle on IBM LinuxONE Susan Adamovich Sam Amsavelu Srujan Jagarlamudi Raghu Malige Michael Morgan Paul Novak David J Simpson Redpaper International Technical Support Organization Best practices and Getting Started Guide for Oracle on IBM LinuxONE June 2020 REDP-5499-00 Note: Before using this information and the product it supports, read the information in “Notices” on page vii. First Edition (June 2020) This edition applies to Oracle 12c, Release 2. This document was created or updated on June 2, 2020. © Copyright International Business Machines Corporation 2020. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . vii Trademarks . viii Preface . 1 Authors. 1 Now you can become a published author, too! . 2 Comments welcome. 3 Stay connected to IBM Redbooks . 3 Chapter 1. Running Linux virtual servers under IBM z/VM . 5 1.1 z/VM fundamentals . 6 1.2 Pre-requisites and assumptions . 6 1.2.1 Pre-requisites . 6 1.2.2 Assumptions . 6 1.3 Configuring a workstation for mainframe access . 7 1.3.1 3270 emulators . 7 1.3.2 Virtual Network Computing client . 7 1.3.3 Connecting from a Linux workstation . 8 1.3.4 Connecting from a MacOS workstation. 8 1.3.5 Connecting from a Windows workstation . 9 1.4 Service validation and notice subscription . 10 1.4.1 RSU validation . 10 1.4.2 Subscribing to service notifications. 10 1.5 Tailoring z/VM for Linux workloads . -
1. D-Bus a D-Bus FAQ Szerint D-Bus Egy Interprocessz-Kommunikációs Protokoll, És Annak Referenciamegvalósítása
Az Udev / D-Bus rendszer - a modern asztali Linuxok alapja A D-Bus rendszer minden modern Linux disztribúcióban jelen van, sőt mára már a Linux, és más UNIX jellegű, sőt nem UNIX rendszerek (különösen a desktopon futó változatok) egyik legalapvetőbb technológiája, és az ismerete a rendszergazdák számára lehetővé tesz néhány rendkívül hasznos trükköt, az alkalmazásfejlesztőknek pedig egyszerűen KÖTELEZŐ ismerniük. Miért ilyen fontos a D-Bus? Mit csinál? D-Bus alapú technológiát teszik lehetővé többek között azt, hogy közönséges felhasználóként a kedvenc asztali környezetünkbe bejelentkezve olyan feladatokat hajtsunk végre, amiket a kernel csak a root felasználónak engedne meg. Felmountolunk egy USB meghajtót? NetworkManagerrel konfiguráljuk a WiFi-t, a 3G internetet vagy bármilyen más hálózati csatolót, és kapcsolódunk egy hálózathoz? Figyelmeztetést kapunk a rendszertől, hogy új szoftverfrissítések érkeztek, majd telepítjük ezeket? Hibernáljuk, felfüggesztjük a gépet? A legtöbb esetben ma már D-Bus alapú technológiát használunk ilyen esetben. A D-Bus lehetővé teszi, hogy egymástól függetlenül, jellemzően más UID alatt indított szoftverösszetevők szabványos és biztonságos módon igénybe vegyék egymás szolgáltatásait. Ha valaha lesz a Linuxhoz professzionális desktop tűzfal vagy vírusirtó megoldás, a dolgok jelenlegi állasa szerint annak is D- Bus technológiát kell használnia. A D-Bus technológia legfontosabb ihletője a KDE DCOP rendszere volt, és mára a D-Bus leváltotta a DCOP-ot, csakúgy, mint a Gnome Bonobo technológiáját. 1. D-Bus A D-Bus FAQ szerint D-Bus egy interprocessz-kommunikációs protokoll, és annak referenciamegvalósítása. Ezen referenciamegvalósítás egyik összetevője, a libdbus könyvtár a D- Bus szabványnak megfelelő kommunikáció megvalósítását segíti. Egy másik összetevő, a dbus- daemon a D-Bus üzenetek routolásáért, szórásáért felelős. -
Linux Low-Latency Tracing for Multicore Hard Real-Time Systems
Hindawi Publishing Corporation Advances in Computer Engineering Volume 2015, Article ID 261094, 8 pages http://dx.doi.org/10.1155/2015/261094 Research Article Linux Low-Latency Tracing for Multicore Hard Real-Time Systems Raphaël Beamonte and Michel R. Dagenais Computer and Software Engineering Department, Polytechnique Montreal, C.P. 6079, Station Downtown, Montreal,´ QC,CanadaH3C3A7 Correspondence should be addressed to Raphael¨ Beamonte; [email protected] Received 29 March 2015; Revised 21 July 2015; Accepted 29 July 2015 Academic Editor: Ying-Tung Hsiao Copyright © 2015 R. Beamonte and M. R. Dagenais. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Real-time systems have always been difficult to monitor and debug because of the timing constraints which rule out anytool significantly impacting the system latency and performance. Tracing is often the most reliable tool available for studying real-time systems. The real-time behavior of Linux systems has improved recently and it is possible to have latencies in the low microsecond range. Therefore, tracers must ensure that their overhead is within that range and predictable and scales well to multiple cores. The LTTng 2.0 tools have been optimized for multicore performance, scalability, and flexibility. We used and extended the real-time verification tool rteval to study the impact of LTTng on the maximum latency on hard real-time applications. We introduced a new real-time analysis tool to establish the baseline of real-time system performance and then to measure the impact added by tracing the kernel and userspace (UST) with LTTng. -
Novell SUSE Linux Package Description and Support Level Information for Contracted Customers and Partners
Novell SUSE Linux Package Description and Support Level Information for Contracted Customers and Partners Definitions and Support Level Descriptions ACC: Additional Customer Contract necessary L1: Installation and problem determination, which means technical support Configuration designed to provide compatibility information, installation assistance, usage support, on-going maintenance and basic troubleshooting. Level 1 Support is not intended to correct product defect errors. L2: Reproduction of problem isolation, which means technical support designed to Potential Issues duplicate customer problems, isolate problem area and provide resolution for problems not resolved by Level 1 Support. L3: Code Debugging and problem resolution, which means technical support designed Patch Provision to resolve complex problems by engaging engineering in resolution of product defects which have been identified by Level 2 Support. Servicelevel Package Short Name Package Description SLES10 SP3 s390x 844-ksc-pcf Korean 8x4x4 Johab Fonts L2 a2ps Converts ASCII Text into PostScript L2 aaa_base SUSE Linux Base Package L3 aaa_skel Skeleton for Default Users L3 aalib An ASCII Art Library L2 aalib-32bit An ASCII Art Library L2 aalib-devel Development Package for AAlib L2 aalib-devel-32bit Development Package for AAlib L2 acct User-Specific Process Accounting L3 acl Commands for Manipulating POSIX Access Control Lists L3 adaptec-firmware Firmware files for Adaptec SAS Cards (AIC94xx Series) L3 agfa-fonts Professional TrueType Fonts L2 aide Advanced Intrusion Detection Environment L2 alsa Advanced Linux Sound Architecture L3 alsa-32bit Advanced Linux Sound Architecture L3 alsa-devel Include Files and Libraries mandatory for Development. L2 alsa-docs Additional Package Documentation. L2 amanda Network Disk Archiver L2 amavisd-new High-Performance E-Mail Virus Scanner L3 amtu Abstract Machine Test Utility L2 ant A Java-Based Build Tool L3 anthy Kana-Kanji Conversion Engine L2 anthy-devel Include Files and Libraries mandatory for Development. -
Tracing and Sampling for Real-Time Partially Simulated Avionics Systems
Tracing and Sampling for Real-Time partially simulated Avionics Systems Raphaël Beamonte Michel Dagenais Computer and Software Engineering Department École Polytechnique de Montréal C.P.6079, Station Downtown, Montréal, Québec, Canada, H3C 3A7 DORSAL Project Meeting December 5, 2012 Introduction Tracing: Study runtime behavior Can be used to measure latency = fundamental for RT debug Tracer requirements: Low-overhead Consistant maximum latency Contribution: Methodology and tool to measure real-time latencies (NPT) Application of NPT to measure LTTng-UST latency Improvements to the real-time behavior of LTTng Raphaël Beamonte – 2012 (CC BY-SA) Tracing and Sampling for RT Systems 1 / 24 Table of Contents 1 Research Context Real-Time Operating Systems The Linux Tracing Toolkit next-generation, LTTng 2 Test environment Presentation of the test environment System verification 3 Baseline results The Non-Preempt Test tool Latency results 4 Improving LTTng added latency Identify the source of the latency Latency results and comparison Raphaël Beamonte – 2012 (CC BY-SA) Tracing and Sampling for RT Systems 2 / 24 Research Context Test environment Real-Time Operating Systems Baseline results The Linux Tracing Toolkit next-generation, LTTng Improving LTTng added latency RTOS: Xenomai vs. Linux Xenomai: ADEOS thin-kernel Interrupt management – non-RT cannot preempt RT Hard Real Time ? Espace utilisateur (User-space) (Tâches non-temps réel) RT and non-RT tasks are independent Full Linux platform ? Noyau Linux (Non-temps réel) Tâches temps réel Micro-noyau (Thin-kernel) Couche matérielle (Hardware) Raphaël Beamonte – 2012 (CC BY-SA) Tracing and Sampling for RT Systems 3 / 24 Research Context Test environment Real-Time Operating Systems Baseline results The Linux Tracing Toolkit next-generation, LTTng Improving LTTng added latency RTOS: Xenomai vs. -
Administration Guide Administration Guide SUSE Linux Enterprise High Availability Extension 15 SP1 by Tanja Roth and Thomas Schraitle
SUSE Linux Enterprise High Availability Extension 15 SP1 Administration Guide Administration Guide SUSE Linux Enterprise High Availability Extension 15 SP1 by Tanja Roth and Thomas Schraitle This guide is intended for administrators who need to set up, congure, and maintain clusters with SUSE® Linux Enterprise High Availability Extension. For quick and ecient conguration and administration, the product includes both a graphical user interface and a command line interface (CLI). For performing key tasks, both approaches are covered in this guide. Thus, you can choose the appropriate tool that matches your needs. Publication Date: September 24, 2021 SUSE LLC 1800 South Novell Place Provo, UT 84606 USA https://documentation.suse.com Copyright © 2006–2021 SUSE LLC and contributors. All rights reserved. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or (at your option) version 1.3; with the Invariant Section being this copyright notice and license. A copy of the license version 1.2 is included in the section entitled “GNU Free Documentation License”. For SUSE trademarks, see http://www.suse.com/company/legal/ . All other third-party trademarks are the property of their respective owners. Trademark symbols (®, ™ etc.) denote trademarks of SUSE and its aliates. Asterisks (*) denote third-party trademarks. All information found in this book has been compiled with utmost attention to detail. However, this does not guarantee complete accuracy. Neither SUSE -
VNC User Guide 7 About This Guide
VNC® User Guide Version 5.3 December 2015 Trademarks RealVNC, VNC and RFB are trademarks of RealVNC Limited and are protected by trademark registrations and/or pending trademark applications in the European Union, United States of America and other jursidictions. Other trademarks are the property of their respective owners. Protected by UK patent 2481870; US patent 8760366 Copyright Copyright © RealVNC Limited, 2002-2015. All rights reserved. No part of this documentation may be reproduced in any form or by any means or be used to make any derivative work (including translation, transformation or adaptation) without explicit written consent of RealVNC. Confidentiality All information contained in this document is provided in commercial confidence for the sole purpose of use by an authorized user in conjunction with RealVNC products. The pages of this document shall not be copied, published, or disclosed wholly or in part to any party without RealVNC’s prior permission in writing, and shall be held in safe custody. These obligations shall not apply to information which is published or becomes known legitimately from some source other than RealVNC. Contact RealVNC Limited Betjeman House 104 Hills Road Cambridge CB2 1LQ United Kingdom www.realvnc.com Contents About This Guide 7 Chapter 1: Introduction 9 Principles of VNC remote control 10 Getting two computers ready to use 11 Connectivity and feature matrix 13 What to read next 17 Chapter 2: Getting Connected 19 Step 1: Ensure VNC Server is running on the host computer 20 Step 2: Start VNC -
RZ/G Verified Linux Package for 64Bit Kernel Version 1.0.5-RT R01TU0278EJ0105 Rev
RZ/G Verified Linux Package for 64bit kernel Version 1.0.5-RT R01TU0278EJ0105 Rev. 1.05 Component list Aug. 31, 2020 Components listed below are installed to the rootfs which is used for booting target boards by building the Verified Linux Package according to the Release Note. Each image name corresponds to the target name used when running bitbake commands such as “bitbake core-image- weston”. Column “weston (Gecko)” corresponds to the building procedure for HTML5 described in the Release Note for HTML5. Versions of some packages installed for HTML5 are different from the other images. In the cases where a version of a specific package installed for HTML5 is different, it is written like as “(Gecko: x.x.x)” in column “version”. weston minimal bsp weston qt version (Gecko) acl ✓ 2.2.52 adwaita-icon-theme-symbolic ✓ ✓ ✓ 3.24.0 alsa-conf ✓ ✓ ✓ ✓ 1.1.4.1 alsa-plugins-pulseaudio-conf ✓ 1.1.4 alsa-states ✓ ✓ ✓ ✓ 0.2.0 alsa-tools ✓ ✓ ✓ 1.1.3 alsa-utils ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-aconnect ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-alsactl ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-alsaloop ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-alsamixer ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-alsatplg ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-alsaucm ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-amixer ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-aplay ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-aseqdump ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-aseqnet ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-iecset ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-midi ✓ ✓ ✓ ✓ 1.1.4 alsa-utils-speakertest ✓ ✓ ✓ ✓ 1.1.4 at ✓ 3.1.20 attr ✓ 2.4.47 audio-init ✓ ✓ ✓ ✓ 1.0 avahi-daemon ✓ ✓ ✓ 0.6.32 avahi-locale-en-gb ✓ ✓ ✓ 0.6.32 base-files ✓ ✓ ✓ ✓ ✓ 3.0.14 base-files-dev ✓ ✓ ✓ 3.0.14 base-passwd ✓ ✓ ✓ ✓ ✓ 3.5.29 bash ✓ ✓ ✓ ✓ ✓ 3.2.57 bash-dev ✓ ✓ ✓ 3.2.57 bayer2raw ✓ ✓ ✓ 1.0 bc ✓ 1.06 bc-dev ✓ 1.06 bluez5 ✓ ✓ ✓ ✓ 5.46 bluez-alsa ✓ ✓ ✓ ✓ 1.0 bt-fw ✓ ✓ ✓ ✓ 8.7.1+git0+0ee619b598 busybox ✓ ✓ ✓ ✓ ✓ 1.30.1 (Gecko: 1.22.0) busybox-hwclock ✓ ✓ ✓ ✓ ✓ 1.30.1 (Gecko: 1.22.0) busybox-udhcpc ✓ ✓ ✓ ✓ ✓ 1.30.1 (Gecko: 1.22.0) bzip2 ✓ ✓ ✓ 1.0.6 R01TU0278EJ0105 Rev.