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Essential System Administration 3rd Edition
Essential System Administration,3rd Edition is the
definitive guide for Unix system administration, covering
all the fundamental and essential tasks required to run such
divergent Unix systems as AIX, FreeBSD, HP-UX, Linux,
Solaris, Tru64 and more. Essential System Administration
provides a clear, concise, practical guide to
the real-world
issues that anyone responsible for a Unix system faces
daily.
The new edition of this indispensable reference has been
fully updated for all the latest operating systems. Even
more importantly, it has been extensively revised and
expanded to consider the current system administrative
topics that administrators need most. Essential System
Administration,3rd Edition covers: DHCP, USB devices, the
latest automation tools, SNMP and network management, LDAP,
PAM, and recent security tools and techniques.
Essential System Administration is comprehensive. But what
has made this book the guide system administrators turn to
over and over again is not just the sheer volume of valuable
information it provides, but the clear, useful way the
information is presented. It discusses the underlying
higher-level concepts, but it also provides the details of
the procedures needed to carry them out. It is not
organized around the features of the Unix operating system,
but around the various facets of a system administrator's
job. It describes all the usual administrative tools that
Unix provides, but it also shows how to use them
intelligently and efficiently.
Whether you use a standalone Unix system, routinely provide
administrative support for a larger shared system, or just
want an understanding of basic administrative functions,
Essential System Administration is for you. This
comprehensive and invaluable book combines the author's
years of practical experience with technical expertise to
help you manage Unix systems as productively and painlessly
as possible.
Preface
1. Introduction to System Administration
Thinking About System Administration
Becoming Superuser
Communicating with Users
About Menus and GUIs
Where Does the Time Go?
2. The Unix Way
Files
Processes
Devices
3. Essential Administrative Tools and Techniques
Getting the Most from Common Commands
Essential Administrative Techniques
4. Startup and Shutdown
About the Unix Boot Process
Initialization Files and Boot Scripts
Shutting Down a Unix System
Troubleshooting: Handling Crashes and Boot Failures
5. TCP/IP Networking
Understanding TCP/IP Networking
Adding a New Network Host
Network Testing and Troubleshooting
6. Managing Users and Groups
Unix Users and Groups
Managing User Accounts
Administrative Tools for Managing User Accounts
Administering User Passwords
User Authentication with PAM
LDAP: Using a Directory Service for User Authentication
7. Security
Prelude: What's Wrong with This Picture?
Thinking About Security
User Authentication Revisited
Protecting Files and the Filesystem
Role-Based Access Control
Network Security
Hardening Unix Systems
Detecting Problems
8. Managing Network Services
Managing DNS Servers
Routing Daemons
Configuring a DHCP Server
Time Synchronization with NTP
Managing Network Daemons under AIX
Monitoring the Network
9. Electronic Mail
About Electronic Mail
Configuring User Mail Programs
Configuring Access Agents
Configuring the Transport Agent
Retrieving Mail Messages
Mail Filtering with procmail
A Few Final Tools
10. Filesystems and Disks
Filesystem Types
Managing Filesystems
From Disks to Filesystems
Sharing Filesystems
11. Backup and Restore
Planning for Disasters and Everyday Needs
Backup Media
Backing Up Files and Filesystems
Restoring Files from Backups
Making Table of Contents Files
Network Backup Systems
Backing Up and Restoring the System Filesystems
12. Serial Lines and Devices
About Serial Lines
Specifying Terminal Characteristics
Adding a New Serial Device
Troubleshooting Terminal Problems
Controlling Access to Serial Lines
HP-UX and Tru64 Terminal Line Attributes
The HylaFAX Fax Service
USB Devices
13. Printers and the Spooling Subsystem
The BSD Spooling Facility
System V Printing
The AIX Spooling Facility
Troubleshooting Printers
Sharing Printers with Windows Systems
LPRng
CUPS
Font Management Under X
14. Automating Administrative Tasks
Creating Effective Shell Scripts
Perl: An Alternate Administrative Language
Expect: Automating Interactive Programs
When Only C Will Do
Automating Complex Configuration Tasks with Cfengine
Stem: Simplified Creation of Client-Server Applications
Adding Local man Pages
15. Managing System Resources
Thinking About System Performance
Monitoring and Controlling Processes
Managing CPU Resources
Managing Memory
Disk I/O Performance Issues
Monitoring and Managing Disk Space Usage
Network Performance
16. Configuring and Building Kernels
FreeBSD and Tru64
HP-UX
Linux
Solaris
AIX System Parameters
17. Accounting
Standard Accounting Files
BSD-Style Accounting: FreeBSD, Linux, and AIX
System V-Style Accounting: AIX, HP-UX, and Solaris
Printing Accounting
Afterword: The Profession of System Administration
SAGE: The System Administrators Guild
Administrative Virtues
Appendix: Administrative Shell Programming
Index
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