UNIX Administration

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UNIX л

Administration


A Comprehensive Sourcebook for Effective Systems and Network Management

Bozidar Levi ^ICRC PRESS

UNIX Administration


UNIX Administration—A Comprehensive Sourcebook for Effective Systems and Network Management…………………………………………………………………………………………………………………….1


Prefaces……………………………………………………………………………………………………………………………..3


Section I: UNIX Administration…………………………………………………………………………………………..6


Chapter List……………………………………………………………………………………………………………..6


…………………………………………………………………………………………………………………………6


Chapter 1: UNIX — Introductory Notes……………………………………………………………………………….7


1.1    UNIX Operating System……………………………………………………………………………………….7


1.2    User’s View of UNIX…………………………………………………………………………………………….9


1.3    The History of UNIX……………………………………………………………………………………………10


1.3.1    Berkeley Standard Distribution — BSD UNIX…………………………………………………10


1.3.2    System V or ATT UNIX……………………………………………………………………………….11


1.4    UNIX System and Network Administration…………………………………………………………….15


1.4.1    System Administrator’s Job…………………………………………………………………………16


1.4.2    Computing Policies…………………………………………………………………………………….19


1.4.3    Administration Guidelines……………………………………………………………………………22


1.4.4    In This Book………………………………………………………………………………………………28


Chapter 2: The Unix Model — Selected Topics………………………………………………………………….30


2.1    Introduction……………………………………………………………………………………………………….30


2.2    Files…………………………………………………………………………………………………………………30


2.2.1    File Ownership…………………………………………………………………………………………..31


2.2.2    File Protection/File Access………………………………………………………………………….34


2.2.3    Access Control Lists (ACLs)………………………………………………………………………..41


2.2.4    File Types…………………………………………………………………………………………………45


2.3    Devices and Special Device Files…………………………………………………………………………49


2.3.1    Special File Names…………………………………………………………………………………….50


2.3.2    Special File Creation…………………………………………………………………………………..50


2.4    Processes…………………………………………………………………………………………………………53


2.4.1    Process Parameters…………………………………………………………………………………..53


2.4.2    Process Life Cycles……………………………………………………………………………………55


2.4.3    Process Handling……………………………………………………………………………………….57


Chapter 3: UNIX Administration Starters…………………………………………………………………………..65


3.1    Superuser and Users………………………………………………………………………………………….65


3.1.1    Becoming a Superuser………………………………………………………………………………..65


3.1.2    Communicating with Other Users…………………………………………………………………65


3.1.3    The su Command……………………………………………………………………………………….66


3.2    UNIX Online Documentation………………………………………………………………………………..67


3.2.1    The man Command……………………………………………………………………………………67


3.2.2    The whatis Database………………………………………………………………………………….71


3.3    System Information…………………………………………………………………………………………….72


3.3.1    System Status Information…………………………………………………………………………..72


3.3.2    Hardware Information…………………………………………………………………………………74


3.4    Personal Documentation…………………………………………………………………………………….78


3.5    Shell Script Programming……………………………………………………………………………………79


3.5.1 UNIX User Shel…………………………………………………………………………………………80


Chapter 3: UNIX Administration Starters


3.5.2 UNIX Shell Scripts;……………………………………………………………………………………..80

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