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BSD – Alternativen Zu Linux
∗BSD { Alternativen zu Linux Karl Lockhoff March 19, 2015 Inhaltsverzeichnis I Woher kommt BSD? I Was ist BSD? I Was ist sind die Unterschiede zwischen FreeBSD, NetBSD und OpenBSD? I Warum soll ich *BSD statt Linux einsetzen? I Chuck Haley und Bill Joy entwickeln den vi in Berkeley I Bill Joy erstellt eine Sammlung von Tools, 1BSD I Unix Version 7 erscheint I 2BSD erscheint (Basis f¨urdie Weiterentwicklung PDP-11) I 3BSD erscheint (erstmalig mit einen eigenen Kernel) I 4BSD erscheint (enth¨altdas fast file system (ffs)) I Bill Joy wechselt zu Sun Microsystems I Kirk McKusick ¨ubernimmt die Entwicklung von BSD I 1978 I 1979 I 1980 I 1981 Woher kommt BSD? I 1976 I Unix Version 6 erscheint I 2BSD erscheint (Basis f¨urdie Weiterentwicklung PDP-11) I 3BSD erscheint (erstmalig mit einen eigenen Kernel) I 4BSD erscheint (enth¨altdas fast file system (ffs)) I Bill Joy wechselt zu Sun Microsystems I Kirk McKusick ¨ubernimmt die Entwicklung von BSD I Bill Joy erstellt eine Sammlung von Tools, 1BSD I Unix Version 7 erscheint I 1979 I 1980 I 1981 Woher kommt BSD? I 1976 I Unix Version 6 erscheint I 1978 I Chuck Haley und Bill Joy entwickeln den vi in Berkeley I 2BSD erscheint (Basis f¨urdie Weiterentwicklung PDP-11) I 3BSD erscheint (erstmalig mit einen eigenen Kernel) I 4BSD erscheint (enth¨altdas fast file system (ffs)) I Bill Joy wechselt zu Sun Microsystems I Kirk McKusick ¨ubernimmt die Entwicklung von BSD I Unix Version 7 erscheint I 1979 I 1980 I 1981 Woher kommt BSD? I 1976 I Unix Version 6 erscheint I 1978 I Chuck Haley und Bill Joy entwickeln den -
An Optimal Real-Time Controller for Vertical Plasma Stabilization N
1 An optimal real-time controller for vertical plasma stabilization N. Cruz, J.-M. Moret, S. Coda, B.P. Duval, H.B. Le, A.P. Rodrigues, C.A.F. Varandas, C.M.B.A. Correia and B. Gonc¸alves Abstract—Modern Tokamaks have evolved from the initial ax- presents important advantages since it allows the creation isymmetric circular plasma shape to an elongated axisymmetric of divertor plasmas, the increase of the plasma current and plasma shape that improves the energy confinement time and the density limit as well as providing plasma stability. However, triple product, which is a generally used figure of merit for the conditions needed for fusion reactor performance. However, the an elongated plasma is unstable due to the forces that pull elongated plasma cross section introduces a vertical instability the plasma column upward or downward. The result of these that demands a real-time feedback control loop to stabilize forces is a plasma configuration that tends to be pushed up or the plasma vertical position and velocity. At the Tokamak down depending on the initial displacement disturbance. For Configuration Variable (TCV) in-vessel poloidal field coils driven example, a small displacement downwards results in the lower by fast switching power supplies are used to stabilize highly elongated plasmas. TCV plasma experiments have used a PID poloidal field coils pulling the plasma down, with increased algorithm based controller to correct the plasma vertical position. strength as the plasma gets further from the equilibrium posi- In late 2013 experiments a new optimal real-time controller was tion. To compensate this instability, feedback controllers have tested improving the stability of the plasma. -
Aligning Intent and Behavior in Software Systems: How Programs Communicate & Their Distribution and Organization
© 2020 William B. Dietz ALIGNING INTENT AND BEHAVIOR IN SOFTWARE SYSTEMS: HOW PROGRAMS COMMUNICATE & THEIR DISTRIBUTION AND ORGANIZATION BY WILLIAM B. DIETZ DISSERTATION Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Computer Science in the Graduate College of the University of Illinois at Urbana-Champaign, 2020 Urbana, Illinois Doctoral Committee: Professor Vikram Adve, Chair Professor John Regehr, University of Utah Professor Tao Xie Assistant Professor Sasa Misailovic ABSTRACT Managing the overwhelming complexity of software is a fundamental challenge because complex- ity is the root cause of problems regarding software performance, size, and security. Complexity is what makes software hard to understand, and our ability to understand software in whole or in part is essential to being able to address these problems effectively. Attacking this overwhelming complexity is the fundamental challenge I seek to address by simplifying how we write, organize and think about programs. Within this dissertation I present a system of tools and a set of solutions for improving the nature of software by focusing on programmer’s desired outcome, i.e. their intent. At the program level, the conventional focus, it is impossible to identify complexity that, at the system level, is unnecessary. This “accidental complexity” includes everything from unused features to independent implementations of common algorithmic tasks. Software techniques driving innovation simultaneously increase the distance between what is intended by humans – developers, designers, and especially the users – and what the executing code does in practice. By preserving the declarative intent of the programmer, which is lost in the traditional process of compiling and linking and building software, it is easier to abstract away unnecessary details. -
The Pkgsrc Guide
The pkgsrc guide Documentation on the NetBSD packages system (2006/02/18) Alistair Crooks [email protected] Hubert Feyrer [email protected] The pkgsrc Developers The pkgsrc guide: Documentation on the NetBSD packages system by Alistair Crooks, Hubert Feyrer, The pkgsrc Developers Published 2006/02/18 01:46:43 Copyright © 1994-2005 The NetBSD Foundation, Inc Information about using the NetBSD package system (pkgsrc) from both a user view for installing packages as well as from a pkgsrc developers’ view for creating new packages. Table of Contents 1. What is pkgsrc?......................................................................................................................................1 1.1. Introduction.................................................................................................................................1 1.2. Overview.....................................................................................................................................1 1.3. Terminology................................................................................................................................2 1.4. Typography .................................................................................................................................3 I. The pkgsrc user’s guide .........................................................................................................................1 2. Where to get pkgsrc and how to keep it up-to-date........................................................................2 -
Volume 5: DAF Variable Detail Pages
Anc hor Volume 5: DAF Variable Detail Pages August 2020 Submitted to: Social Security Administration Office of Retirement and Disability Policy Office of Research, Demonstration, and Employment Support Washington, DC 20024-2796 Project Officers: Paul O’Leary and Debra Tidwell-Peters Contract Number: SS00-16-60003 Submitted by: Mathematica 1100 1st Street, NE 12th Floor Washington, DC 20002-4221 Telephone: (202) 484-9220 Facsimile: (202) 863-1763 Project Director: Jody Schimmel Hyde Reference Number: 50214.Y3.T05.530.360 Suggested Citation: “Disability Analysis File 2018 (DAF18) Documentation: Data from January 1994 through December 2018.” Washington, DC: Mathematica, August 2020. This page has been left blank for double-sided copying. MATHEMATICA CONTENTS GLOSSARY .................................................................................................................................................. .v OVERVIEW OF DAF DOCUMENTATION ................................................................................................... .ix QUICK REFERENCE GUIDE ....................................................................................................................... 1 PART A DAF VARIABLE DETAIL PAGES .................................................................................................. 7 PART B RSA VARIABLE DETAIL PAGES .............................................................................................. 635 iii This page has been left blank for double-sided copying. MATHEMATICA GLOSSARY AB Accelerated -
Openbsd Ports...What the Heck?!
OpenBSD ports...what the heck?! Jasper Lievisse Adriaanse [email protected] pkgsrcCon, Basel, May 2010 Agenda 1 Introduction 2 Hackathons 3 pkg add(1) 4 Recent developments 5 Differences with pkgsrc 6 Conclusion Agenda 1 Introduction 2 Hackathons 3 pkg add(1) 4 Recent developments 5 Differences with pkgsrc 6 Conclusion Who am I? Jasper Lievisse Adriaanse (jasper@). Developer since 2006. Code in all parts of the system. Terminology Port Platform OpenBSD... Unix-like, multi-platform operating system. Derived from 4.4BSD, NetBSD fork. Kernel + userland + documentation maintained together. 3rd party applications available via the ports system. Anoncvs, OpenSSH, strlcpy(3)/strlcat(3). One release every 6 months, regardless. OpenBSD... (cont.) 16 platforms: alpha, amd64, armish, hp300, hppa, i386, landisk, loongson, mvme68k, mvme88k, sgi, socppc, sparc, sparc64, vax, zaurus. OpenBSD... (cont.) 13 binary architectures: alpha, amd64, arm, hppa, i386, m68k, mips64, mips64el, powerpc, sh, sparc, sparc64, vax. OpenBSD... (cont.) W.I.P. platforms aviion, hppa64, palm, solbourne. Agenda 1 Introduction 2 Hackathons 3 pkg add(1) 4 Recent developments 5 Differences with pkgsrc 6 Conclusion What is...a Heckethun? Hackathons do not have talks, or a specific schedule. People hack and discuss... ...and drink (Humppa!). Hackathons General hackathon Mini hackathons Hardware, network, ports, filesystem/uvm, routing. Heckethuns ere-a fur sterteeng sumetheen oor feenishing sumetheeng, nut but. Su dun’t bork zee tree-a! Bork bork bork! Ports hackathons Ports hackathons Yearly event. Very creative and productive atmosphere. No presentations. Just hacking, fun and beer... ...and wine! Agenda 1 Introduction 2 Hackathons 3 pkg add(1) 4 Recent developments 5 Differences with pkgsrc 6 Conclusion µ history Common ancestor; the FreeBSD ape. -
Kafl: Hardware-Assisted Feedback Fuzzing for OS Kernels
kAFL: Hardware-Assisted Feedback Fuzzing for OS Kernels Sergej Schumilo1, Cornelius Aschermann1, Robert Gawlik1, Sebastian Schinzel2, Thorsten Holz1 1Ruhr-Universität Bochum, 2Münster University of Applied Sciences Motivation IJG jpeg libjpeg-turbo libpng libtiff mozjpeg PHP Mozilla Firefox Internet Explorer PCRE sqlite OpenSSL LibreOffice poppler freetype GnuTLS GnuPG PuTTY ntpd nginx bash tcpdump JavaScriptCore pdfium ffmpeg libmatroska libarchive ImageMagick BIND QEMU lcms Adobe Flash Oracle BerkeleyDB Android libstagefright iOS ImageIO FLAC audio library libsndfile less lesspipe strings file dpkg rcs systemd-resolved libyaml Info-Zip unzip libtasn1OpenBSD pfctl NetBSD bpf man mandocIDA Pro clamav libxml2glibc clang llvmnasm ctags mutt procmail fontconfig pdksh Qt wavpack OpenSSH redis lua-cmsgpack taglib privoxy perl libxmp radare2 SleuthKit fwknop X.Org exifprobe jhead capnproto Xerces-C metacam djvulibre exiv Linux btrfs Knot DNS curl wpa_supplicant Apple Safari libde265 dnsmasq libbpg lame libwmf uudecode MuPDF imlib2 libraw libbson libsass yara W3C tidy- html5 VLC FreeBSD syscons John the Ripper screen tmux mosh UPX indent openjpeg MMIX OpenMPT rxvt dhcpcd Mozilla NSS Nettle mbed TLS Linux netlink Linux ext4 Linux xfs botan expat Adobe Reader libav libical OpenBSD kernel collectd libidn MatrixSSL jasperMaraDNS w3m Xen OpenH232 irssi cmark OpenCV Malheur gstreamer Tor gdk-pixbuf audiofilezstd lz4 stb cJSON libpcre MySQL gnulib openexr libmad ettercap lrzip freetds Asterisk ytnefraptor mpg123 exempi libgmime pev v8 sed awk make -
Pipenightdreams Osgcal-Doc Mumudvb Mpg123-Alsa Tbb
pipenightdreams osgcal-doc mumudvb mpg123-alsa tbb-examples libgammu4-dbg gcc-4.1-doc snort-rules-default davical cutmp3 libevolution5.0-cil aspell-am python-gobject-doc openoffice.org-l10n-mn libc6-xen xserver-xorg trophy-data t38modem pioneers-console libnb-platform10-java libgtkglext1-ruby libboost-wave1.39-dev drgenius bfbtester libchromexvmcpro1 isdnutils-xtools ubuntuone-client openoffice.org2-math openoffice.org-l10n-lt lsb-cxx-ia32 kdeartwork-emoticons-kde4 wmpuzzle trafshow python-plplot lx-gdb link-monitor-applet libscm-dev liblog-agent-logger-perl libccrtp-doc libclass-throwable-perl kde-i18n-csb jack-jconv hamradio-menus coinor-libvol-doc msx-emulator bitbake nabi language-pack-gnome-zh libpaperg popularity-contest xracer-tools xfont-nexus opendrim-lmp-baseserver libvorbisfile-ruby liblinebreak-doc libgfcui-2.0-0c2a-dbg libblacs-mpi-dev dict-freedict-spa-eng blender-ogrexml aspell-da x11-apps openoffice.org-l10n-lv openoffice.org-l10n-nl pnmtopng libodbcinstq1 libhsqldb-java-doc libmono-addins-gui0.2-cil sg3-utils linux-backports-modules-alsa-2.6.31-19-generic yorick-yeti-gsl python-pymssql plasma-widget-cpuload mcpp gpsim-lcd cl-csv libhtml-clean-perl asterisk-dbg apt-dater-dbg libgnome-mag1-dev language-pack-gnome-yo python-crypto svn-autoreleasedeb sugar-terminal-activity mii-diag maria-doc libplexus-component-api-java-doc libhugs-hgl-bundled libchipcard-libgwenhywfar47-plugins libghc6-random-dev freefem3d ezmlm cakephp-scripts aspell-ar ara-byte not+sparc openoffice.org-l10n-nn linux-backports-modules-karmic-generic-pae -
Systems Cost/Performance Analysis (Study 2.3) Final Report
AEROSPffE REPORT NO. AZ "'14(7343)-1, VOL III Systems Cost/Performance Analysis (Study 2.3) Final Report Volume IH: Programmer's Manual and User's Guide Prepared by V'< ADVANCED MISSION ANALYSIS DIRECTORATE Advanced Orbital Systems Division 27 September 1974 Prepared for OFFICE OF MANNED SPACE FLIGHT NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Washington, D.C. 20546 Contract No. NASW-2575 Systems Engineering Operations THE AEROSPACE CORPORATION .(NASA-C-lP3377) SYSTEMS COSr/PERFORACE N75-309211 ANALYSIS (STUDY 2.3). VOLUME 3: IPROG AMER'S MANUAL AND USER'S GUIDE Final Report (Aerospace Corp., El Segundo, Calif.) Unclas 592 p HC $13.25 CSCL 05A G3/8-1 34377 ) Aerospace Report No. ATR-74(7343)-I, Vol, III SYSTEMS COST/PERFORMANCE ANALYSIS (STUDY 2. 3) FINAL REPORT Volume III: Programmer's Manual and User's Guide Prepared by Advanced Mission Analysis Directorate Advanced Orbital Systems Division Z7 September 1974 Systems Engineering Operations THE AEROSPACE CORPORATION El Segundo, California Prepared for OFFICE OF MANNED SPACE FLIGHT NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Washington, D. C. Contract No. NASW-2575 PAGE INTENTIONALLY BLANK Aerospace Report No. ATR-74(7343)-I, Vol. III SYSTEMS COST/PERFORMANCE ANALYSIS (STUDY 2. 3) FINAL REPORT Volume III: Programmer's Manual and User's Guide Prepared R *F.OJ , Man e Data Sys ems An sis Section Data Processing Subdivision Approved L. Sashkin, Director R. H. Herndon, Assoc. Group Data Processing Subdivision Director Information Processing Division Advanced Mission Analysis Engineering Science Operations Directorate Advanced Orbital Systems Division PRECEDING PAGE-iii- BLANK NOT FILMED PAGE INTENTIONALLY BLANK FOREWORD This report documents The Aerospace Corporation effort on Study 2.3, Systems Cost/Perfbrmance Analysis, performed under NASA Contract NASW-2575 during Fiscal Year 1974. -
Reproducible Builds Summit II
Reproducible Builds Summit II December 13-15, 2016. Berlin, Germany Aspiration, 2973 16th Street, Suite 300, San Francisco, CA 94103 Phone: (415) 839-6456 • [email protected] • aspirationtech.org Table of Contents Introduction....................................................................................................................................5 Summary.......................................................................................................................................6 State of the field............................................................................................................................7 Notable outcomes following the first Reproducible Builds Summit..........................................7 Additional progress by the reproducible builds community......................................................7 Current work in progress.........................................................................................................10 Upcoming efforts, now in planning stage................................................................................10 Event overview............................................................................................................................12 Goals.......................................................................................................................................12 Event program........................................................................................................................12 Projects participating -
Nix(OS) - Revolutionizing Packaging and Configuration Management!
Nix(OS) - Revolutionizing packaging and configuration management! The Purely Functional Linux Distribution 1 Before we begin (FYI) Ask questions at any time Please ask lots of questions :) The slides contain some redundancy There are a few optional slides at the end Please give me feedback Louder Faster/slower More/less details Etc. 2 About me Michael Weiss aka. primeos Computer science student at the University of Tübingen I love free soware, etc. First nixpkgs commit: 2016-10-05 I maintain ~41 packages and ~3 modules (2018-06-08) I also love privacy (i.e. no more details :P) Email: [email protected] (#privacy) 3 Main components Nix (package manager) Nixpkgs (Nix packages collection) NixOS (operating system) NixOps (DevOps / cloud deployment tool) 4 Nix* ISO/OSI model NixOps NixOS Nixpkgs Nix 5 Other tools Hydra (Nix based continuous build system) Disnix (distributed services deployment) PatchELF (change dynamic linker and RPATH) {cabal,go,node,pip,python,pypi,composer,hex,bower,vim,...}2 6 History Started as a research project (with funding) First paper in 2004 (many will follow) Nix package manager developed by Eelco Dolstra as part of his PhD research (~2003) First NixOS prototype developed by Armijn Hemel as his master's thesis project Hydra developed as part of the LaQuSo Buildfarm project 7 Timeline 2003: init (research begins) 2007: NixOS becomes usable + x86_64 support 2008: Website moved to nixos.org 2009: Nix logo + Nix(OS) build on Hydra 2011: Migration from Subversion to Git(Hub) 2013: Switch from Upstart to systemd + -
Packaging for 11 Platforms with One Tool
Packaging for 11 platforms with one tool Jens Rehsack 2013 Jens Rehsack () Packaging for 11 platforms with one tool 2013 1 / 6 everyone know that but packaging takes time can't use dpkg's from developers machine on CentOS production server dependencies don't compile on backend AIX machine Packaging improves . Packaging Why packaging? Packaging provides Information - always know what is installed Reliability - always know if things belong together Useful - easy deployment / rollout Jens Rehsack () Packaging for 11 platforms with one tool 2013 2 / 6 everyone know that but packaging takes time can't use dpkg's from developers machine on CentOS production server dependencies don't compile on backend AIX machine Packaging Why packaging? Packaging provides Information - always know what is installed Reliability - always know if things belong together Useful - easy deployment / rollout Packaging improves . Jens Rehsack () Packaging for 11 platforms with one tool 2013 2 / 6 but packaging takes time can't use dpkg's from developers machine on CentOS production server dependencies don't compile on backend AIX machine Packaging Why packaging? Packaging provides Information - always know what is installed Reliability - always know if things belong together Useful - easy deployment / rollout Packaging improves . everyone know that Jens Rehsack () Packaging for 11 platforms with one tool 2013 2 / 6 Packaging Why packaging? Packaging provides Information - always know what is installed Reliability - always know if things belong together Useful - easy