I

IA (interactive) process class, 320

IBM’s AIX, 23–24

IDEs (integrated development environments), 725

idraw, 768–770

if…elif…else statements, 601–603

if statements

in Java, 735

in Perl, 653–654

in Python, 685–686

if…then statements, 597–601, 630–631

ifconfig, 487–488, 496

IFS (Internal Field Separator), 608

ignoreeof, 117, 120

IM (Instant Messaging), 289–290, 783–785

in GNOME, 182

in KDE, 212

Image manipulation and viewing, 771–773

ImageMagick package, 772–773

index function (Perl), 647

Indexes, permuted, 841–843

inetd (master Internet daemon), 489

Information storage, managing, 401–427

Information theft attacks, 516

Informix, 767

Ingres, 767

Inheritance of classes, in Java, 738–739

init process (PID 1), 307, 313, 721

init.d directory, 374

inittab file (/etc/inittab), 384–385

Inodes, explained, 404

Input, keyboard, 65, 102–103

Input mode (vi editor), 135–137

Input redirection, 101–102

Input redirection operator (<), 101–102

Installation of system software, 367–369

defaults, 368–369

parameters, 369

Instances (in OOP), 729

Integer tests, table of, 598

Intelligent connections, 499

Interactive shells, 110

Interfaces, in Java, 741–742

Internals (programs), 6

Internet, 271–301

Internet access, 271–273

Internet add-on applications, 780–788

Internet addresses, 272–273, 296–300, 484–485

format of, 485

obtaining, 485–487

Internet applications (GNOME), 181–183

Internet applications (KDE), 211–213

Internet domains, 273

Internet e-mail applications, 782–783

Internet Explorer web browser, 291

Internet mailing lists, 285–286

Internet multimedia players and viewers, 785–787

Internet telephony applications, 787–788

Internet Worm of 1988, 350

Interpreted language, Perl as, 643

Interrupt codes, 613

Intrusion attacks, 516

Intrusion detection, 517

IP addresses, 272

IP (Internet Protocol) family, 248

IPP (Internet Printing Protocol), 386

iptables firewall for Linux, 515

IPv6 (6bone), 486

IRC (Internet Relay Chat), 286–289

command summary, 288

getting started, 287–288

in GNOME, 182

in KDE, 212

IRC daemon (ircd), 289

IRC server, running, 289

IRIX, 26

ISP (Internet service provider), 272