DOCSLIB.ORG

SAMBA Project Documentation

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
SAMBA Project Documentation SAMBA Project Documentation 23rd September 2003 This book is a collection of HOWTOs added to Samba documentation over the years. Samba is always under development, and so is its’ documentation. This release of the documentation represents a major revision or layout as well as contents. The most recent version of this document can be found at http://www.samba.org/ on the ”Documentation” page. Please send updates to Jelmer Vernooij, John H. Terpstra or Gerald (Jerry) Carter. The Samba-Team would like to express sincere thanks to the many people who have with or without their knowledge contributed to this update. The size and scope of this project would not have been possible without significant community contribution. A not insignificant number of ideas for inclusion (if not content itself) has been obtained from a number of Unofficial HOWTOs - to each such author a big ”Thank-you” is also offered. Please keep publishing your Unofficial HOWTOs - they are a source of inspiration and application knowledge that is most to be desired by many Samba users and administrators. Legal Notice This documentation is distributed under the GNU General Public License (GPL) version 2. A copy of the license is included with the Samba source distribution. A copy can be found on-line at http://www.fsf.org/licenses/gpl.txt 3 Attributions Introduction to Samba • David Lechnyr <[email protected]> How to Install and Test SAMBA • Andrew Tridgell <[email protected]> • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> • Karl Auer <[email protected]> • Dan Shearer <[email protected]> Fast Start for the Impatient • John H. Terpstra <[email protected]> Server Types and Security Modes • Andrew Tridgell <[email protected]> • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> Domain Control • John H. Terpstra <[email protected]> • Gerald (Jerry) Carter <[email protected]> • David Bannon <[email protected]> • Guenther Deschner <[email protected]> (LDAP updates) Backup Domain Control • John H. Terpstra <[email protected]> 4 • Volker Lendecke <[email protected]> • Guenther Deschner <[email protected]> (LDAP updates) Domain Membership • John H. Terpstra <[email protected]> • Jeremy Allison <[email protected]> • Gerald (Jerry) Carter <[email protected]> • Andrew Tridgell <[email protected]> • Jelmer R. Vernooij <[email protected]> • Guenther Deschner <[email protected]> (LDAP updates) Stand-alone Servers • John H. Terpstra <[email protected]> MS Windows Network Configuration Guide • John H. Terpstra <[email protected]> Network Browsing • John H. Terpstra <[email protected]> • Jelmer R. Vernooij <[email protected]> Account Information Databases • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> • Gerald (Jerry) Carter <[email protected]> • Jeremy Allison <[email protected]> • Guenther Deschner <[email protected]> (LDAP updates) • Olivier (lem) Lemaire <[email protected]> Group Mapping MS Windows and UNIX • John H. Terpstra <[email protected]> • Jean Fran¸coisMicouleau 5 • Gerald (Jerry) Carter <[email protected]> File, Directory and Share Access Controls • John H. Terpstra <[email protected]> • Jeremy Allison <[email protected]> • Jelmer R. Vernooij <[email protected]> (drawing) File and Record Locking • Jeremy Allison <[email protected]> • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> • Eric Roseme <[email protected]> Securing Samba • Andrew Tridgell <[email protected]> • John H. Terpstra <[email protected]> Interdomain Trust Relationships • John H. Terpstra <[email protected]> • Rafal Szczesniak <[email protected]> • Jelmer R. Vernooij <[email protected]> (drawing) • Stephen Langasek <[email protected]> Hosting a Microsoft Distributed File System tree on Samba • Shirish Kalele <[email protected]> • John H. Terpstra <[email protected]> Classical Printing Support • Kurt Pfeifle <kpfeifl[email protected]> • Gerald (Jerry) Carter <[email protected]> • John H. Terpstra <[email protected]> CUPS Printing Support 6 • Kurt Pfeifle <kpfeifl[email protected]> • Ciprian Vizitiu <[email protected]> (drawings) • Jelmer R. Vernooij <[email protected]> (drawings) Stackable VFS modules • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> • Tim Potter <[email protected]> • Simo Sorce (original vfs skel README) • Alexander Bokovoy (original vfs netatalk docs) • Stefan Metzmacher (Update for multiple modules) Winbind: Use of Domain Accounts • Tim Potter <[email protected]> • Andrew Tridgell <[email protected]> • Naag Mummaneni <getnag@rediffmail.com> (Notes for Solaris) • John Trostel <[email protected]> • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> Advanced Network Management • John H. Terpstra <[email protected]> System and Account Policies • John H. Terpstra <[email protected]> Desktop Profile Management • John H. Terpstra <[email protected]> PAM-Based Distributed Authentication • John H. Terpstra <[email protected]> • Stephen Langasek <[email protected]> 7 Integrating MS Windows Networks with Samba • John H. Terpstra <[email protected]> Unicode/Charsets • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> • TAKAHASHI Motonobu <[email protected]> Samba Backup Techniques • John H. Terpstra <[email protected]> High Availability Options • John H. Terpstra <[email protected]> Upgrading from Samba-2.x to Samba-3.0.0 • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> • Gerald (Jerry) Carter <[email protected]> Migration from NT4 PDC to Samba-3 PDC • John H. Terpstra <[email protected]> SWAT The Samba Web Administration Tool • John H. Terpstra <[email protected]> The Samba Checklist • Andrew Tridgell <[email protected]> • Jelmer R. Vernooij <[email protected]> • Dan Shearer <[email protected]> Analyzing and Solving Samba Problems • Gerald (Jerry) Carter <[email protected]> • Jelmer R. Vernooij <[email protected]> • David Bannon <[email protected]> 8 • Dan Shearer <[email protected]> Reporting Bugs • John H. Terpstra <[email protected]> • Jelmer R. Vernooij <[email protected]> • Andrew Tridgell <[email protected]> How to Compile Samba • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> • Andrew Tridgell <[email protected]> Portability • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> Samba and Other CIFS Clients • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> • Dan Shearer <[email protected]> • Jim McDonough <[email protected]> (OS/2) Samba Performance Tuning • Paul Cochrane <[email protected]> • Jelmer R. Vernooij <[email protected]> • John H. Terpstra <[email protected]> DNS and DHCP Configuration Guide • John H. Terpstra <[email protected]> Further Resources • Jelmer R. Vernooij <[email protected]> 9 Contents I. General Installation 11 1. Introduction to Samba 12 1.1. Background . 12 1.2. Terminology . 13 1.3. Related Projects . 14 1.4. SMB Methodology . 14 1.5. Epilogue . 15 1.6. Miscellaneous . 15 2. How to Install and Test SAMBA 16 2.1. Obtaining and Installing Samba . 16 2.2. Configuring Samba (smb.conf) . 16 2.2.1. Configuration file syntax . 16 2.2.2. Example Configuration . 16 2.2.2.1. Test Your Config File with testparm . 17 2.2.3. SWAT . 18 2.3. List Shares Available on the Server . 18 2.4. Connect with a UNIX Client . 18 2.5. Connect from a Remote SMB Client . 19 2.6. What If Things Don’t Work? . 19 2.7. Common Errors . 19 2.7.1. Large Number of smbd Processes . 20 2.7.2. Error Message: open oplock ipc........................ 20 2.7.3. “The network name cannot be found” . 20 3. Fast Start for the Impatient 21 3.1. Note . 21 II. Server Configuration Basics 22 4. Server Types and Security Modes 23 4.1. Features and Benefits . 23 4.2. Server Types . 24 4.3. Samba Security Modes . 24 4.3.1. User Level Security . 25 4.3.1.1. Example Configuration . 25 4.3.2. Share Level Security . 25 4.3.2.1. Example Configuration . 26 4.3.3. Domain Security Mode (User Level Security) . 26 4.3.3.1. Example Configuration . 26 10 Contents 4.3.4. ADS Security Mode (User Level Security) . 27 4.3.4.1. Example Configuration . 27 4.3.5. Server Security (User Level Security) . 28 4.3.5.1. Example Configuration . 29 4.4. Password Checking . 29 4.5. Common Errors . 30 4.5.1. What Makes Samba a Server? . 31 4.5.2. What Makes Samba a Domain Controller? . 31 4.5.3. What Makes Samba a Domain Member? . 31 4.5.4. Constantly Losing Connections to Password Server . 31 5. Domain Control 32 5.1. Features and Benefits . 33 5.2. Basics of Domain Control . 35 5.2.1. Domain Controller Types . 35 5.2.2. Preparing for Domain Control . 37 5.3. Domain Control — Example Configuration . 39 5.4. Samba ADS Domain Control . 41 5.5. Domain and Network Logon Configuration . 41 5.5.1. Domain Network Logon Service . 41 5.5.1.1. Example Configuration . 41 5.5.1.2. The Special Case of MS Windows XP Home Edition . 42 5.5.1.3. The Special Case of Windows 9x/Me . 42 5.5.2. Security Mode and Master Browsers . 44 5.6. Common Errors . 44 5.6.1. “$” Cannot Be Included in Machine Name . 44 5.6.2. Joining Domain Fails Because of Existing Machine Account . 45 5.6.3. The System Cannot Log You On (C000019B) . 45 5.6.4. The Machine Trust Account Is Not Accessible . 46 5.6.5. Account Disabled . 46 5.6.6. Domain Controller Unavailable . 46 5.6.7. Cannot Log onto Domain Member Workstation After Joining Domain . 47 6. Backup Domain Control 48 6.1. Features and Benefits . 48 6.2. Essential Background Information . 49 6.2.1. MS Windows NT4-style Domain Control . 49 6.2.1.1. Example PDC Configuration . 51 6.2.2. LDAP Configuration Notes . 51 6.2.3. Active Directory Domain Control . 52 6.2.4. What Qualifies a Domain Controller on the Network? . 52 6.2.5. How does a Workstation find its Domain Controller? .
Load more

Recommended publications
  • Sistemi Operativi Real-Time Marco Cesati Lezione R13 Sistemi Operativi Real-Time – II Schema Della Lezione
    Sistemi operativi real-time Marco Cesati Lezione R13 Sistemi operativi real-time – II Schema della lezione Caratteristiche comuni VxWorks LynxOS Sistemi embedded e real-time QNX eCos Windows Linux come RTOS 15 gennaio 2013 Marco Cesati Dipartimento di Ingegneria Civile e Ingegneria Informatica Università degli Studi di Roma Tor Vergata SERT’13 R13.1 Sistemi operativi Di cosa parliamo in questa lezione? real-time Marco Cesati In questa lezione descriviamo brevemente alcuni dei più diffusi sistemi operativi real-time Schema della lezione Caratteristiche comuni VxWorks LynxOS 1 Caratteristiche comuni degli RTOS QNX 2 VxWorks eCos 3 LynxOS Windows Linux come RTOS 4 QNX Neutrino 5 eCos 6 Windows Embedded CE 7 Linux come RTOS SERT’13 R13.2 Sistemi operativi Caratteristiche comuni dei principali RTOS real-time Marco Cesati Corrispondenza agli standard: generalmente le API sono proprietarie, ma gli RTOS offrono anche compatibilità (compliancy) o conformità (conformancy) allo standard Real-Time POSIX Modularità e Scalabilità: il kernel ha una dimensione Schema della lezione Caratteristiche comuni (footprint) ridotta e le sue funzionalità sono configurabili VxWorks Dimensione del codice: spesso basati su microkernel LynxOS QNX Velocità e Efficienza: basso overhead per cambi di eCos contesto, latenza delle interruzioni e primitive di Windows sincronizzazione Linux come RTOS Porzioni di codice non interrompibile: generalmente molto corte e di durata predicibile Gestione delle interruzioni “separata”: interrupt handler corto e predicibile, ISR lunga
    [Show full text]
  • CIFS/NFS) Administrator's Guide
    Hitachi Data Ingestor File System Protocols (CIFS/NFS) Administrator's Guide Product Version Getting Help Contents MK-90HDI035-13 © 2013- 2015 Hitachi, Ltd. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or stored in a database or retrieval system for any purpose without the express written permission of Hitachi, Ltd. Hitachi, Ltd., reserves the right to make changes to this document at any time without notice and assume no responsibility for its use. This document contains the most current information available at the time of publication. When new or revised information becomes available, this entire document will be updated and distributed to all registered users. Some of the features described in this document might not be currently available. Refer to the most recent product announcement for information about feature and product availability, or contact Hitachi Data Systems Corporation at https://portal.hds.com. Notice: Hitachi, Ltd., products and services can be ordered only under the terms and conditions of the applicable Hitachi Data Systems Corporation agreements. he use of Hitachi, Ltd., products is governed by the terms of your agreements with Hitachi Data Systems Corporation. Hitachi is a registered trademark of Hitachi, Ltd., in the United States and other countries. Hitachi Data Systems is a registered trademark and service mark of Hitachi, Ltd., in the United States and other countries. Archivas, Essential NAS Platform, HiCommand, Hi-Track, ShadowImage, Tagmaserve, Tagmasoft, Tagmasolve, Tagmastore, TrueCopy, Universal Star Network, and Universal Storage Platform are registered trademarks of Hitachi Data Systems Corporation.
    [Show full text]
  • Samba-3 by Example
    Samba-3 by Example Practical Exercises in Successful Samba Deployment John H. Terpstra May 27, 2009 ABOUT THE COVER ARTWORK The cover artwork of this book continues the freedom theme of the first edition of \Samba-3 by Example". The history of civilization demonstrates the fragile nature of freedom. It can be lost in a moment, and once lost, the cost of recovering liberty can be incredible. The last edition cover featured Alfred the Great who liberated England from the constant assault of Vikings and Norsemen. Events in England that finally liberated the common people came about in small steps, but the result should not be under-estimated. Today, as always, freedom and liberty are seldom appreciated until they are lost. If we can not quantify what is the value of freedom, we shall be little motivated to protect it. Samba-3 by Example Cover Artwork: The British houses of parliament are a symbol of the Westminster system of government. This form of government permits the people to govern themselves at the lowest level, yet it provides for courts of appeal that are designed to protect freedom and to hold back all forces of tyranny. The clock is a pertinent symbol of the importance of time and place. The information technology industry is being challenged by the imposition of new laws, hostile litigation, and the imposition of significant constraint of practice that threatens to remove the freedom to develop and deploy open source software solutions. Samba is a software solution that epitomizes freedom of choice in network interoperability for Microsoft Windows clients.
    [Show full text]
  • Chapter 2: Installing Samba on a Unix System
    ,ch02.26865 Page 31 Friday, November 19, 1999 3:28 PM Chapter 2 2 Installing Samba on a Unix System Now that you know what Samba can do for you and your users, it’s time to get your own network set up. Let’s start with the installation of Samba itself on a Unix system. When dancing the samba, one learns by taking small steps. It’s just the same when installing Samba; we need to teach it step by step. This chapter will help you to start off on the right foot. For illustrative purposes, we will be installing the 2.0.4 version of the Samba server on a Linux* system running version 2.0.31 of the kernel. However, the installation steps are the same for all of the platforms that Samba supports. A typical installa- tion will take about an hour to complete, including downloading the source files and compiling them, setting up the configuration files, and testing the server. Here is an overview of the steps: 1. Download the source or binary files. 2. Read the installation documentation. 3. Configure a makefile. 4. Compile the server code. 5. Install the server files. 6. Create a Samba configuration file. 7. Test the configuration file. 8. Start the Samba daemons. 9. Test the Samba daemons. * If you haven’t heard of Linux yet, then you’re in for a treat. Linux is a freely distributed Unix-like oper- ating system that runs on the Intel x86, Motorola PowerPC, and Sun Sparc platforms. The operating sys- tem is relatively easy to configure, extremely robust, and is gaining in popularity.
    [Show full text]
  • Samba's AD DC: Samba 4.2 and Beyond
    Samba's AD DC: Samba 4.2 and Beyond Presented by Andrew Bartlett of Catalyst // 2014-09 About me ● Andrew Bartlett ● Samba Team member since 2001 ● Working on the AD DC since 2006 ● These views are my own, but I do with to thank: – My employer: Catalyst – My fellow Samba Team members Open Source Technologies Samba's AD DC ● The combination of many years work – File server – Print server – Active Directory Domain controller – (and many other features) ● First Release Dec 2012 ● Now on the road to Samba 4.2 – Due for RC1 on Monday Sep 22 Re-opening the heart of the network ● Samba's AD DC brings open source to the heart of the network again ● Samba has long provided a Domain Controller – But without support for Group Policy and other AD features like Kerberos ● Organizations again have a practical choice other than Microsoft Windows The flexibility to innovate ● Open Source lets you do more ● Just as Samba is in many NAS devices, including NETGEAR's ReadyNAS ● Samba inside Catalyst's print server – No CALs, multi-device access ● Imagine – What if was also an AD DC? – Instant branch office solution – Perhaps managed from the cloud? Breaking vendor lock in ● Samba can migrate to and from Microsoft Windows based AD domains – Without loss of data – Without password resets or domain joins ● Samba 4.0 can upgrade existing Samba 3.x domains to AD – And you can even migrate that to a Microsoft Windows AD if you want to – We won't hold you against your will! Uses Native Microsoft Admin tools ● Microsoft Management Console snap-ins – In general, fully
    [Show full text]
  • Client Side Samba Linux Clients in Microsoft Windows Environments
    Client Side Samba Linux Clients in Microsoft Windows Environments Ralf Haferkamp OpenLDAP Team Lars Müller Samba Team May 8, 2006 Motivation Operating Systems Market Share (Client and Server) 1,80% 2,70% Microsoft Apple Linux 95,50% 2 © Novell Inc, Confidential & Proprietary Mandatory Requirements Overview • Domain join • Single Sign On Authentication • Name Service Switch (NSS) • X11 Display Manager integration (KDM, GDM) 3 © Novell Inc, Confidential & Proprietary Mandatory Requirement Authentication • Seamless PAM Integration – Let PAM winbind behave like other PAM modules – Mapping Microsoft to PAM error messages and codes • Kerberized PAM Winbind – Automatic ticket refresh and renew • Account Policies – Password – Logon hours – Lockout 4 © Novell Inc, Confidential & Proprietary Architecture Overview 5 © Novell Inc, Confidential & Proprietary Supplementary Requirements • Winbind Offline mode • Kerberized Client Applications – web browsers (konqueror, FireFox) – MUA (KMail) • File Access – libsmbclient using apps (konqueror, nautilus) – CIFS system wide? • Printing 6 © Novell Inc, Confidential & Proprietary YaST Integration (1) 7 © Novell Inc, Confidential & Proprietary YaST Integration (2) 8 © Novell Inc, Confidential & Proprietary Samba Winbind AD Integration Demo To do • Acessing CIFS Home Directory • Machine Account Password Changes • Localisation • GUI integration for Services For UNIX (SFU) • Group Policy Support (GPO) • Roaming Profiles • Logon Scripts 10 © Novell Inc, Confidential & Proprietary Available Resources • SUSE Linux Enterprise Desktop 10 • http://openSUSE.org/Samba • Samba.org samba-docs subversion Questions & Answers ? 11 © Novell Inc, Confidential & Proprietary Unpublished Work of Novell, Inc. All Rights Reserved. This work is an unpublished work and contains confidential, proprietary, and trade secret information of Novell, Inc. Access to this work is restricted to Novell employees who have a need to know to perform tasks within the scope of their assignments.
    [Show full text]
  • SMB Analysis
    NAP-3 Microsoft SMB Troubleshooting Rolf Leutert, Leutert NetServices, Switzerland © Leutert NetServices 2013 www.wireshark.ch Server Message Block (SMB) Protokoll SMB History Server Message Block (SMB) is Microsoft's client-server protocol and is most commonly used in networked environments where Windows® operating systems are in place. Invented by IBM in 1983, SMB has become Microsoft’s core protocol for shared services like files, printers etc. Initially SMB was running on top of non routable NetBIOS/NetBEUI API and was designed to work in small to medium size workgroups. 1996 Microsoft renamed SMB to Common Internet File System (CIFS) and added more features like larger file sizes, Windows RPC, the NT domain service and many more. Samba is the open source SMB/CIFS implementation for Unix and Linux systems 2 © Leutert NetServices 2013 www.wireshark.ch Server Message Block (SMB) Protokoll SMB over TCP/UDP/IP SMB over NetBIOS over UDP/TCP SMB / NetBIOS was made routable by running Application over TCP/IP (NBT) using encapsulation over 137/138 139 TCP/UDP-Ports 137–139 .. Port 137 = NetBIOS Name Service (NS) Port 138 = NetBIOS Datagram Service (DGM) Port 139 = NetBIOS Session Service (SS) Data Link Ethernet, WLAN etc. Since Windows 2000, SMB runs, by default, with a thin layer, the NBT's Session Service, on SMB “naked” over TCP top of TCP-Port 445. Application 445 DNS and LLMNR (Link Local Multicast Name . Resolution) is used for name resolution. Port 445 = Microsoft Directory Services (DS) SMB File Sharing, Windows Shares, Data Link Ethernet, WLAN etc. Printer Sharing, Active Directory 3 © Leutert NetServices 2013 www.wireshark.ch Server Message Block (SMB) Protokoll NetBIOS / SMB History NetBIOS Name Service (UDP Port 137) Application • Using NetBIOS names for clients and services.
    [Show full text]
  • FR-1998-01-27.Pdf
    1±27±98 Tuesday Vol. 63 No. 17 January 27, 1998 Pages 3791±4150 Briefings on how to use the Federal Register For information on briefings in Washington, DC, see announcement on the inside cover of this issue. Now Available Online via GPO Access Free online access to the official editions of the Federal Register, the Code of Federal Regulations and other Federal Register publications is available on GPO Access, a service of the U.S. Government Printing Office at: http://www.access.gpo.gov/nara/index.html For additional information on GPO Access products, services and access methods, see page II or contact the GPO Access User Support Team via: ★ Phone: toll-free: 1-888-293-6498 ★ Email: [email protected] federal register 1 II Federal Register / Vol. 63, No. 17 / Tuesday, January 27, 1998 SUBSCRIPTIONS AND COPIES PUBLIC Subscriptions: Paper or fiche 202±512±1800 Assistance with public subscriptions 512±1806 General online information 202±512±1530; 1±888±293±6498 FEDERAL REGISTER Published daily, Monday through Friday, (not published on Saturdays, Sundays, or on official holidays), Single copies/back copies: by the Office of the Federal Register, National Archives and Paper or fiche 512±1800 Records Administration, Washington, DC 20408, under the Federal Assistance with public single copies 512±1803 Register Act (49 Stat. 500, as amended; 44 U.S.C. Ch. 15) and FEDERAL AGENCIES the regulations of the Administrative Committee of the Federal Subscriptions: Register (1 CFR Ch. I). Distribution is made only by the Superintendent of Documents, U.S. Government Printing Office, Paper or fiche 523±5243 Washington, DC 20402.
    [Show full text]
  • View the Slides
    SMB3.1.1 POSIX Protocol Extensions: Summary and Current Implementation Status Steve French Azure Storage – Microsoft Samba Team And SMB Jeremy Allison Google/Samba Team 3.1.1 Legal Statement This work represents the views of the author(s) and does not necessarily reflect the views of Microsoft or Google Linux is a registered trademark of Linus Torvalds. Other company, product, and service names may be trademarks or service marks of others. Outline Linux is a lot more than POSIX ... Why do these extensions matter? Implementation Status What works today? Some details How to handle Linux continuing to extend APIs? Wireshark and Tracing Linux > POSIX Currently huge number of syscalls! (try “git grep SYSCALL_DEFINE” well over 850 and 500+ are even documented “man syscalls” FS layer has 223). Verified today vs Only about 100 POSIX API calls 513 syscalls with man pages! +12 just since last year’s SDC! Some examples of new fs ones from past 9 months ... Syscall name Kernel Version introduced io_uring_enter 5.1 io_uring_register 5.1 io_uring_setup 5.1 move_mount 5.2 open_tree 5.2 fsconfig 5.2 fsmount 5.2 fsopen 5.2 fspick 5.2 Repeating an old slide ... Remember LINUX > POSIX And not just new syscalls … new flags ... 2 examples of richer Linux vs. simpler POSIX fallocate has 7 flags – Insert range – Unshare range – Zero range – Keep size – But POSIX fallocate has no flags Rename (renameat2) has 3 flags – noreplace, whiteout and exchange – POSIX rename has none Network File systems matter ● these extensions to most popular network fs protocol (SMB3) are important ● block devices struggle to do file system tasks: locking, security, leases, consistent metadata Linux Apps need to work over network mounts and continue to work as Linux evolves Improve common situations where customers have Linux and Windows and Mac clients Make sure extensions work with most secure, most optimal SMB3.1.1 dialect (don’t encourage less secure network file systems, or even SMB1/CIFS) Quick Overview of Status ● Linux kernel client: – 5.1 kernel or later can be used.
    [Show full text]
  • Using C-Kermit 2Nd Edition
    << Previous file Chapter 1 Introduction An ever-increasing amount of communication is electronic and digital: computers talking to computers Ð directly, over the telephone system, through networks. When you want two computers to communicate, it is usually for one of two reasons: to interact directly with another computer or to transfer data between the two computers. Kermit software gives you both these capabilities, and a lot more too. C-Kermit is a communications software program written in the C language. It is available for many different kinds of computers and operating systems, including literally hundreds of UNIX varieties (HP-UX, AIX, Solaris, IRIX, SCO, Linux, ...), Digital Equipment Corporation (Open)VMS, Microsoft Windows NT and 95, IBM OS/2, Stratus VOS, Data General AOS/VS, Microware OS-9, the Apple Macintosh, the Commodore Amiga, and the Atari ST. On all these platforms, C-Kermit's services include: • Connection establishment. This means making dialup modem connections or (in most cases) network connections, including TCP/IP Telnet or Rlogin, X.25, LAT, NET- BIOS, or other types of networks. For dialup connections, C-Kermit supports a wide range of modems and an extremely sophisticated yet easy-to-use dialing directory. And C-Kermit accepts incoming connections from other computers too. • Terminal sessions. An interactive terminal connection can be made to another com- puter via modem or network. The Windows 95, Windows NT, and OS/2 versions of C-Kermit also emulate specific types of terminals, such as the Digital Equipment Cor- poration VT320, the Wyse 60, or the ANSI terminal types used for accessing BBSs or PC UNIX consoles, with lots of extras such as scrollback, key mapping, printer con- trol, colors, and mouse shortcuts.
    [Show full text]
  • Embedded Systems - ECE)​​ I -M.TECH I -Semester (AUTONOMOUS-R18
    Presentation on Principles of Distributed Embedded Systems (Embedded Systems - ECE)​​ I -M.TECH I -Semester (AUTONOMOUS-R18) Prepared by, Dr. S. Vinoth Associate Professor UNIT - I REAL TIME ENVIRONMENT 2 UNIT - I REAL-TIME ENVIRONMENT .Real-time computer system requirements .classification of real time systems .simplicity, global time .internal and external clock synchronization .real time model. Real time communication .temporal relations, dependability .power and energy awareness .real time communication .event triggered .rate constrained .time triggered. 3 What is an Embedded system? 4 What is a real-time system? . A real-time system is any information processing system which has to respond to externally generated input stimuli within a finite and specified period –the correctness depends not only on the logical result but also the time it was delivered –failure to respond is as bad as the wrong response! . The computer is a component in a larger engineering system => EMBEDDED COMPUTER SYSTEM 99% of all processors are for the embedded systems market 5 Terminology • Hard real-time — systems where it is absolutely imperative that responses occur within the required deadline. E.g. Flight control systems. • Soft real-time — systems where deadlines are important but which will still function correctly if deadlines are occasionally missed. E.g. Data acquisition system. • Real real-time — systems which are hard real-time and which the response times are very short. E.g. Missile guidance system. • Firm real-time — systems which are soft real-time but in which there is no benefit from late delivery of service. A single system may have all hard, soft and real real-time subsystems In reality many systems will have a cost function associated with missing each deadline.
    [Show full text]
  • Python Course
    Python Course Job Python is a totally free language to download, use, and code. Its commands are mostly in Ready simple English. This makes it easy to remember and write commands. The code is readable and Courses with a little knowledge, a developer can learn many things just by looking at the code. Why learn Python ? 1. First step in Programming : • Python can be your starting point into the programming domain. • Python learning need no prior programming or scripting skills. • Python helps in becoming fully stacked programmers. • Python’s wide range of functionalities allows implementation of complex applications with ease. 2. Excellent Job Opportunities : • Big corporations like Google, Yahoo!, Disney, Nokia, and IBM all use Python. • Python had the largest year-on-year job demand growth. • Python is the ideal solution for start-ups. • Python allows you to code fast, building complex applications with minimum lines of code that are 5 times less than Java and 10 times less than C++. 3. Python on Raspberry Pi : • Raspberry Pi with Python as programming language helps build robots, radios, arcade machines, even cameras. • Developing DIY (do-it-yourself) projects using Python can be a rewarding experience enabling you coming up with innovative ideas and gadgets. 4. Artificial Intelligence and Machine Learning : • With numerical computation engines such as NumPy and SciPy, Python is preferred language for computer science research., particularly related to Artificial Intelligence (AI) , and Machine Learning (ML) • Given the flexibility of the language, its speed, and the machine learning functionality, Python is expected to dominate the AI / ML landscape Course Contents (details in next page) • Introduction to Python • Data Types , Collection data Types • Control Structures , Functions , Modules • Object-Oriented Programming Training method , Approach • File Handling • On-line sessions covering concepts, details, example scripts and exercises.
    [Show full text]