A

Absolute permissions, 82–83

access_log file (Apache), 480–481

Accessibility, 187, 219–220

Accountability, providing, 396

Accounting (for system usage), 429–431

ACEs (access control entries), 330

ACLs (access control lists), 330–331

Add-on software, 755–790

commercial, 755–756

open-source, 756–757

Administration concepts, 358–367

Administrative commands

running, 362–364

UNIX standard, 361–365

Administrative files, protecting, 396

Administrative interfaces, 358–361

Administrative logins, 372–373

AIT (Advanced Intelligent Tape), 402

AIX (Advanced Interactive eXchange), 23–24

AIX 5L, 24

AIX system administration menus, 360–361

AIX user administration menu, 363

Aliases (command), 113, 120–122

Amarok audio player, 786

Ampersand (&) symbol

at end of command line, 105

for procedures in Perl, 656

Anjuta, 725

Anonymous FTP

administering, 492

example session, 260–261

retrieving files using, 260–261

AOL (America Online), 291

Apache (web server), 457–481, 782

basic authentication login window, 475

binary package installation, 463–464

CGI support in, 471–473

configuration, 468–479

front ends for, 479

history of, 459

installation of, 459–468

and LAMP, 475–478

source installation, 464–467

suexec feature of, 473–474

support for PHP, 477–478

system startup script, 466–467

user directories, 470–471

Apache home page, 462

Apache log files, 480–481

Apache modules, 467–468

Apache package directory structure, 462–463, 466

Append (>>) operator, 64,101

Apple’s Mac OS X, 22–23

Applet Viewer (Java), 747–748

Applets (Java), 173, 730, 746–748

Application development tools, CDE, 197

Application integration tools, CDE, 197

Applications, 7–8, 24, 755–790

commercial, 755–756

open-source, 756–757

Applixware, 759

apropos command, 838

apt-cache command, 461

apt-get command, 461

Aqua Deskop, Mac OS X Tiger, 360, 363

Archives, 707

Argument expansion (commands), 96–97

Arithmetic functions. See Mathematical functions

ARPANET, 248

Array index, 592, 649

Array index keys, 652

Array slices, in Perl, 651

Arrays, 592

in awk, 629–630

in Java, 734

modifying in Perl, 650–651

in Perl, 649–651

reading and printing in Perl, 650

sorting in Perl, 651

ASCII files, 533

aspell command, 574

Assembler, of gcc compiler, 709

Assistive technology (GNOME), 187

Assistive technology (KDE), 219–220

Associative arrays, 629

in Perl, 652–653, 655

in Python, 683–685

Asterisk (*) operator, in Python, 680

Asterisk (*) wildcard, 65, 97

at command, 309–311, 382

AT&T, 9–11

Audio applications, 773–775

Audit trail, 367

Authentication

basic, 474–475

NFS, 513

Authoritative translations (DNS), 505

Automounter, NFS, 510–512

Avaya Internet telephony, 788

awk program, 617–636, 638–642

arrays, 629–630

BEGIN and END in, 626

calling a function, 633

case sensitivity, 624

command-line arguments, 634–635

comparison operators, 624–625

compound patterns, 625

control statements, 625, 630–632

default patterns and actions, 619

ending a program, 632

fields, 619–620, 627–628

for loops, 632

getting input, 634

how it works, 618–622

if…then statements, 630–631

input and output, 633–636

multiline programs, 621–622

numbers, 629

pattern matching, 622–626

printing output, 635

range patterns, 625–626

record separators, 628

regular expressions, 622–624

running from a file, 620–621

sending output to files, 636

specifying actions, 626–633

standard input and output, 620

strings, 628–629

troubleshooting, 640–641

user-defined functions, 632–633

using instead of grep, 618

using with sed, 638–640

variables, 626–628

versions of, 618

while loops, 631–632

awk -f command, 620

AWT (Abstract Window Toolkit), 748–750

AWT event handling, 749–750