D

daemons

autofs, 206

controlling network services with, 35

cron, 36

defined, 35, 802

disabling

SELinux protection for, 714

Samba, 520

data streams in Linux, 29

date

configuring with Date/Time Properties tool, 171, 172

setting system, 123, 124

default desktops, 680–681

deleting

partitions, 188, 193

user accounts, 281

dependencies and RPM installations, 224

depmod module, 383–384

desktops. See also GNOME Desktop Environment; KDE Desktop Environment

desktop environment package groups, 111–112

GNOME and KDE, 677–680

managing default, 680–681

troubleshooting, 746

/dev directory

defined, 802

viewing devices in, 12, 14

development package groups, 114–115

devices

configuring for parallel ports, 77–78

hotswappable, 77–80

knowing name associated with partitions, 98

serial port configurations for, 77

df command, 185–186, 751–752

dhclient command, 632

DHCP (Dynamic Host Configuration Protocol), 627–633

about, 614

BOOTP protocol and, 627

client configuration for, 632–633

connecting server and client computers, 633

defined, 802

exam coverage of, 615

finding MAC addresses for clients, 631

getting server's IP address information, 86–87

installing server and client packages, 627

lab questions and answers, 641–642, 644–647

MULTICAST setting for servers, 628

network configuration tool for clients, 340

prerequisite skills for, 46

self test and answers, 640–641, 643

server configuration for, 628–631

summarized, 637

two-minute drill, 638

working with Windows clients, 631

DHCP clients

configuring, 632–633

connecting to server, 633

finding MAC addresses for, 631

installing client packages, 627

network configuration tool for, 340

troubleshooting, 632

DHCP servers

configuring, 628–631

connecting client to, 633

getting IP address information from, 86–87

installing server packages, 627

MULTICAST setting for, 628

dig command, 575–576

direct memory address (DMA) channels, 5, 6

directional brackets (< >), 451

directives for Apache, 452–455

directories. See also home directories; root directory; shared directories; and specific directories

absolute and relative paths for, 20

adding shared directory with NFS Server Configuration tool, 499–502

/boot, 801

changing default permissions for user, 289–290

checking shared Samba printers and, 520–521

creating shared, 302–303

/dev, 12, 14, 802

/etc, 162, 287

exporting NFS, 496–499

filesystem, 12, 200–207

home, 285–286

init scripts hard linked to /etc, 162

kernel installation into /usr/src/ linux, 393–394

kernel module, 385–388

Linux, 12

mounting shared Samba, 521–523

reviewing SELinux security for, 210

sharing with NFS clients, 509–512

source RPM build, 233

Squid, 477

structure of /usr/src/redhat, 231

/var/log, 362

disabled mode for SELinux, 707

disabling SELinux daemon protection, 714

Disk Druid

defined, 802

LVM configuration with, 418

partitions with, 184, 185

disk quotas. See quotas

diskless NFS clients, 511

display managers

defined, 663, 802

gdm and kdm, 663–665

setting, 663–664

displays

configuring in Kickstart

Configurator, 259–260

configuring multiple X.org, 660

selecting with Display Settings tool, 673

starting from remote clients, 675–676

Distributed Intrusion Detection System, 274

DMA (direct memory address) channels, 5, 6

dmesg command, 29, 803

DNS (Domain Name Service), 558–584

BIND, 561–577

defined, 558, 559, 803

DNS clients, 560–561

inverse DNS pointers in NFS, 504

lab questions and answers, 580, 582–584

named daemon for, 559

packages for, 559–560

prerequisite skills for, 45

reverse zone not delegated, 574

self test and answers, 579–580, 581

serial number errors in, 574

shortcomings of, 573–574

summarized, 577

topics on exam, 558

two-minute drill, 578

types of DNS servers, 561

DNS clients

configuration files installed with RHEL, 559

configuring Linux computer as, 560–561

DNS servers

about localhost.zone file, 567

caching-only name servers, 561, 563–565, 801

configuration files for, 561–563

configuring with Red Hat Domain

Name Service tool, 561

exercise setting up, 576–577

forwarding-only name server, 561, 565–566

lack case sensitivity, 568

name servers suggested for exam study, 567

packages required for, 559–560

reverse lookups with named.local file, 567, 568

reverse zone not delegated, 574

searching named.ca for root DNS servers on Internet, 566

slave name servers, 561, 565

starting named daemon, 573

timing for, 573–574

types of, 561

zone files for master, 570–572

documentation

access to during exams, 123

access to man pages during exams, 123

kernel, 393

looking up Samba variables on man pages, 529

man pages for xinetd configuration variables, 618

PAM module, 305

Samba, 520

Domain Name Service. See DNS

domains

accepting mail from unresolved, 595

configuring Samba server to join, 533

configuring with master DNS server, 567–569

names reserved for, 466

setting up Samba to share directories on Microsoft, 525

DOS FDISK.EXE utility, 186

dot (.)

/etc/hosts.allow and /etc/hosts.deny wildcard, 695

indicating hidden files, 286

double redirection arrows (> >), 30

Dovecot

about, 587, 589

activating, 590–591

configuring, 590

creating secure certificates for, 591

defined, 803

installing packages for, 589

lab questions and answers, 606–607, 609–611

self test and answers, 605–606, 608–609

SMTP used to send mail, 587–588

summarized, 603

two-minute drill, 604

downloading

kernel src.rpm package, 394–395

kernel tar files, 396

Red Hat Enterprise Linux, 53–55, 60

drivers

loading kernel, 158

options for kernel device, 403–407

selecting printer, 345, 346

dual-core CPUs, 803

dumpe2fs command, 754, 755, 803

DVD/CD drives

backups to, 37

compatible with filesystem, 12

Dynamic DNS, 558

Dynamic Host Configuration Protocol. See DHCP

dynamic IP addresses, 39