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Viser: How Linux Works, 2nd Edition - What Every Superuser Should Know

How Linux Works, 2nd Edition - What Every Superuser Should Know

How Linux Works, 2nd Edition

What Every Superuser Should Know
Brian Ward
(2014)
Sprog: Engelsk
No Starch Press, Incorporated
422,00 kr.
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Detaljer om varen

  • Paperback: 392 sider
  • Udgiver: No Starch Press, Incorporated (November 2014)
  • ISBN: 9781593275679
Unlike some operating systems, Linux doesn t try to hide the important bits from you it gives you full control of your computer. But to truly master Linux, you need to understand its internals, like how the system boots, how networking works, and what the kernel actually does. In this completely revised second edition of the perennial best seller How Linux Works, author Brian Ward makes the concepts behind Linux internals accessible to anyone curious about the inner workings of the operating system. Inside, you ll find the kind of knowledge that normally comes from years of experience doing things the hard way. You ll learn: How Linux boots, from boot loaders to init implementations (systemd, Upstart, and System V) How the kernel manages devices, device drivers, and processes How networking, interfaces, firewalls, and servers work How development tools work and relate to shared libraries How to write effective shell scripts You ll also explore the kernel and examine key system ta
Praise for the First Edition of How Linux Works;Preface; Who Should Read This Book?; Prerequisites; How to Read This Book; A Hands-On Approach; How This Book is Organized; What''s New in the Second Edition?; A Note on Terminology;Acknowledgments;
Chapter 1: The Big Picture;
1.1
1.1 Levels and Layers of Abstraction in a Linux System;
1.2
1.2 Hardware: Understanding Main Memory;
1.3
1.3 The Kernel;
1.4
1.4 User Space;
1.5
1.5 Users;
1.6
1.6 Looking Forward;
Chapter 2: Basic Commands and Directory Hierarchy;
2.1
2.1 The Bourne Shell: /bin/sh;
2.2
2.2 Using the Shell;
2.3
2.3 Basic Commands;
2.4
2.4 Navigating Directories;
2.5
2.5 Intermediate Commands;
2.6
2.6 Changing Your Password and Shell;
2.7
2.7 Dot Files;
2.8
2.8 Environment and Shell Variables;
2.9
2.9 The Command Path;
2.10
2.10 Special Characters;
2.11
2.11 Command-Line Editing;
2.12
2.12 Text Editors;
2.13
2.13 Getting Online Help;
2.14
2.14 Shell Input and Output;
2.15
2.15 Understanding Error Messages;
2.16
2.16 Listing and Manipulating Processes;
2.17
2.17 File Modes and Permissions;
2.18
2.18 Archiving and Compressing Files;
2.19
2.19 Linux Directory Hierarchy Essentials;
2.20
2.20 Running Commands as the Superuser;
2.21
2.21 Looking Forward;
Chapter 3: Devices;
3.1
3.1 Device Files;
3.2
3.2 The sysfs Device Path;
3.3
3.3 dd and Devices;
3.4
3.4 Device Name Summary;
3.5
3.5 udev;
3.6
3.6 In-Depth: SCSI and the Linux Kernel;
Chapter 4: Disks and Filesystems;
4.1
4.1 Partitioning Disk Devices;
4.2
4.2 Filesystems;
4.3
4.3 swap space;
4.4
4.4 Looking Forward: Disks and User Space;
4.5
4.5 Inside a Traditional Filesystem;
Chapter 5: How the Linux Kernel Boots;
5.1
5.1 Startup Messages;
5.2
5.2 Kernel Initialization and Boot Options;
5.3
5.3 Kernel Parameters;
5.4
5.4 Boot Loaders;
5.5
5.5 GRUB Introduction;
5.6
5.6 UEFI Secure Boot Problems;
5.7
5.7 Chainloading Other Operating Systems;
5.8
5.8 Boot Loader Details;
Chapter 6: How User Space Starts;
6.1
6.1 Introduction to init;
6.2
6.2 System V Runlevels;
6.3
6.3 Identifying Your init;
6.4
6.4 systemd;
6.5
6.5 Upstart;
6.6
6.6 System V init;
6.7
6.7 Shutting Down Your System;
6.8
6.8 The Initial RAM Filesystem;
6.9
6.9 Emergency Booting and Single-User Mode;
Chapter 7: System Configuration: Logging, System Time, Batch Jobs, and Users;
7.1
7.1 The Structure of /etc;
7.2
7.2 System Logging;
7.3
7.3 User Management Files;
7.4
7.4 getty and login;
7.5
7.5 Setting the Time;
7.6
7.6 Scheduling Recurring Tasks with cron;
7.7
7.7 Scheduling One-Time Tasks with at;
7.8
7.8 Understanding User IDs and User Switching;
7.9
7.9 User Identification and Authentication;
7.10
7.10 PAM;
7.11
7.11 Looking Forward;
Chapter 8: A Closer Look at Processes and Resource Utilization;
8.1
8.1 Tracking Processes;
8.2
8.2 Finding Open Files with lsof;
8.3
8.3 Tracing Program Execution and System Calls;
8.4
8.4 Threads;
8.5
8.5 Introduction to Resource Monitoring;
8.6
8.6 Measuring CPU Time;
8.7
8.7 Adjusting Process Priorities;
8.8
8.8 Load Averages;
8.9
8.9 Memory;
8.10
8.10 Monitoring CPU and Memory Performance with vmstat;
8.11
8.11 I/O Monitoring;
8.12
8.12 Per-Process Monitoring with pidstat;
8.13
8.13 Further Topics;
Chapter 9: Understanding your Network and its Configuration;
9.1
9.1 Network Basics;
9.2
9.2 Network Layers;
9.3
9.3 The Internet Layer;
9.4
9.4 Routes and the Kernel Routing Table;
9.5
9.5 Basic ICMP and DNS Tools;
9.6
9.6 The Physical Layer and Ethernet;
9.7
9.7 Understanding Kernel Network Interfaces;
9.8
9.8 Introduction to Network Interface Configuration;
9.9
9.9 Boot-Activated Network Configuration;
9.10
9.10 Problems with Manual and Boot-Activated Network Configuration;
9.11
9.11 Network Configuration Managers;
9.12
9.12 Resolving Hostnames;
9.13
9.13 Localhost;
9.14
9.14 The Transport Layer: TCP, UDP, and Services;
9.15
9.15 Revisiting a Simple Local Network;
9.16
9.16 Understanding DHCP;
9.17
9.17 Configuring Linux as a Router;
9.18
9.18 Private Networks;
9.19
9.19 Network Address Translation (IP Masquerading);
9.20
9.20 Routers and Linux;
9.21
9.21 Firewalls;
9.22
9.22 Ethernet, IP, and ARP;
9.23
9.23 Wireless Ethernet;
9.24
9.24 Summary;
Chapter 10: Network Applications and Services;
10.1
10.1 The Basics of Services;
10.2
10.2 Network Servers;
10.3
10.3 Secure Shell (SSH);
10.4
10.4 The inetd and xinetd Daemons;
10.5
10.5 Diagnostic Tools;
10.6
10.6 Remote Procedure Call (RPC);
10.7
10.7 Network Security;
10.8
10.8 Looking Forward;
10.9
10.9 Sockets: How Processes Communicate with the Network;
10.10
10.10 Unix Domain Sockets;
Chapter 11: Introduction to Shell Scripts;
11.1
11.1 Shell Script Basics;
11.2
11.2 Quoting and Literals;
11.3
11.3 Special Variables;
11.4
11.4 Exit Codes;
11.5
11.5 Conditionals;
11.6
11.6 Loops;
11.7
11.7 Command Substitution;
11.8
11.8 Temporary File Management;
11.9
11.9 Here Documents;
11.10
11.10 Important Shell Script Utilities;
11.11
11.11 Subshells;
11.12
11.12 Including Other Files in Scripts;
11.13
11.13 Reading User Input;
11.14
11.14 When (Not) to Use Shell Scripts;
Chapter 12: Moving Files Across the Network;
12.1
12.1 Quick Copy;
12.2
12.2 rsync;
12.3
12.3 Introduction to File Sharing;
12.4
12.4 Sharing Files with Samba;
12.5
12.5 NFS Clients;
12.6
12.6 Further Network File Service Options and Limitations;
Chapter 13: User Environments;
13.1
13.1 Guidelines for Creating Startup Files;
13.2
13.2 When to Alter Startup Files;
13.3
13.3 Shell Startup File Elements;
13.4
13.4 Startup File Order and Examples;
13.5
13.5 Default User Settings;
13.6
13.6 Startup File Pitfalls;
13.7
13.7 Further Startup Topics;
Chapter 14: A Brief Survey of the Linux Desktop;
14.1
14.1 Desktop Components;
14.2
14.2 A Closer Look at the X Window System;
14.3
14.3 Exploring X Clients;
14.4
14.4 The Future of X;
14.5
14.5 D-Bus;
14.6
14.6 Printing;
14.7
14.7 Other Desktop Topics;
Chapter 15: Development Tools;
15.1
15.1 The C Compiler;
15.2
15.2 make;
15.3
15.3 Debuggers;
15.4
15.4 Lex and Yacc;
15.5
15.5 Scripting Languages;
15.6
15.6 Java;
15.7
15.7 Looking Forward: Compiling Packages;
Chapter 16: Introduction to Compiling Software From C Source Code;
16.1
16.1 Software Build Systems;
16.2
16.2 Unpacking C Source Packages;
16.3
16.3 GNU Autoconf;
16.4
16.4 Installation Practice;
16.5
16.5 Applying a Patch;
16.6
16.6 Troubleshooting Compiles and Installations;
16.7
16.7 Looking Forward;
Chapter 17: Building on the Basics;
17.1
17.1 Web Servers and Applications;
17.2
17.2 Databases;
17.3
17.3 Virtualization;
17.4
17.4 Distributed and On-Demand Computing;
17.5
17.5 Embedded Systems;
17.6
17.6 Final Remarks;Bibliography;Updates;
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