P

Package Manager utility. See pirut tool

Package Updater (Pup), 236, 811

packages, 222–269. See also Red Hat Package Manager; source RPMs

about RPM, 223

adding, 111, 238–244

applications package groups, 113–114

automating installation with kickstart, 244–260

Base System, 118–120

basic customization, 108–110

defined, 223

desktop environment, 111–112

development package groups, 114–115

DHCP, 627

DNS, 559–560

editing ks.cfg file before installing, 254

elinks RPM, 448

finding mail server, 589

installed with Anaconda, 127

installing RPM, 224–225

lab questions and answers on, 264–266, 268–269

listing installed RPMs, 230

managing, 222–227

names of RPM, 223

overview of Linux package groups, 110–120

removing, 225, 238

required for NFS, 496

restoring missing X configuration file for existing, 674

selecting in Kickstart Configurator, 260

self test and answers on, 263–264, 267–268

Servers package group, 115–118

summary of package management, 260

tarballs for distributing Linux, 23

testing RPM, 225

two-minute drill for, 261–262

updates for kernel RPM, 226–227

updating with Pup and Red Hat Network, 234–238

using RPM queries, 227–228

validating signatures of, 228

verifying installed RPM, 229

packet filtering, 697–698

packets

chains for, 698

defined, 697

forwarding, 699, 700

iptables command effect on, 48–49

NAT handling of, 703

routing, 705

using iptables command to control, 698–700

PAM (Pluggable Authentication Modules), 272, 305–313

authenticating halting and rebooting computer, 706

configuring, 310–311

defined, 305, 810

documentation for, 305

limiting user access with, 311–313

location of configuration files, 306

types of modules and files for, 306–308

using /etc/pam.d/login for configuring login, 308–310, 312

pam_listfile.so module, 311–312

parallel ports, 77–78

parameters

passing to GRUB, 149–150

shell, 27–28

xinetd, 619

parted utility, 191–196

defined, 810

deleting partitions with, 193

fdisk utility vs., 191, 192

making swap partition using, 195–196

mistakes using, 191

overview, 191

setting up new drive without partitions, 193–194

troubleshooting with, 747, 752–753

using, 192–193

viewing commands for, 191–192

Partition Options screen (Kickstart Configurator), 258

partitions. See also fdisk utility; parted utility

adding during installation, 99–101

BIOS limits on cylinders reported, 105

checking with dumpe2fs, 754

configuring one filesystem on multiple, 17

converting LVM1 filesystem to LVM2, 430

defined, 96

Disk Druid for, 184, 185

drive configured without, 189, 193–194

filesystem corruption on, 752–753

formatting with mkfs command, 15, 17, 755

installation steps after making, 106

kernels stored in /boot, 379

key commands and options to check disks and, 755

kickstart file partitioning options, 251–253

knowing device name associated with, 98

limitations on writing, 96, 187

LVM, 18

mirroring /home, 415–417

mounting from hard drive in rescue mode, 742

mounting other, 18–19

naming, 97–98

options for Kickstart Configurator, 258

planning, 98

RAID, 96

separate filesystems for, 101

stability and security of multiple, 102

storage space required for RHEL, 103–104

swap, 190–191, 195–196, 747

swap space on, 104–105, 815

troubleshooting new, 747–748

using care creating exam, 102

utilities for creating, 185–196

partprobe command, 195, 810

passwd command, 32

passwords

assigning user, 276–277

changing user, 32

configuring Web, 462

creating with /etc/passwd, 275

encrypting Samba server, 538

importance of good, 277

managing aging information from shadow file, 283–284

managing Samba user, 534–535

protecting Web sites and directories, 460–461, 464–466

requirements in First Boot process, 125

root, 108, 735

shadow, 33

tracing clear text, 624

using corresponding Samba and Windows users and, 529, 533

PATA (Primary ATA), 810

patching kernels, 390–391

PATH variable

checking, 28

defined, 810

setting and changing, 27

using in crontab file, 355

paths, absolute and relative, 20

PC Cards (PCMCIA), 78, 79

PCI devices, 5

PDC (Primary Domain Controller), 810

PE (physical extent), 810

performance

recompiled kernels and improved, 377

Squid improvements of intranets, 481

tips for NFS, 504–505

permissions

access control lists, 208–210

adding sticky bit to Samba, 542

based on umask values, 32

changing user file and directory default, 289–290

executable script, 28–29

file, 30–31

overriding inherited, 463–464

setting Samba share, 539

SUID and SGID, 32–33

permissive mode for SELinux, 707, 709

PGP (Pretty Good Privacy), 810

physical extent (PE), 810

physical volumes. See PVs

pico, 8

ping command

preventing other computers from using, 699

using, 41–42

ping of death, 383

piping data streams, 29

pirut tool (Package Manager utility)

adding packages with, 111

defined, 810

illustrated, 243

installing with, 243–244

managing packages with, 242–243

Pluggable Authentication Modules. See PAM

PnP (plug and play), 73

Policy Module options (SELinux Management Tool), 715

POP3 (Post Office Protocol)

about, 589

prerequisite skills for, 45, 586

portmap daemon, 497, 505

portmap RPM package, 496

ports

attaching devices to parallel, 77–78

compatible with filesystem, 12

configuring for Apache, 458

configuring with Security Level Configuration tool, 701–703

enabling for DNS communications, 564, 565

securing, 48

serial, 77

troubleshooting USB, 5

typical numbers for xinetd, 615–616

Post Office Protocol. See POP3

Postfix

about, 586

configuring and activating, 598–599

lab questions, 606–607, 609–611

prerequisite skills for, 45

rebooting after modifying configuration, 598–599

RPM packages for, 588–589

selecting with alternatives command, 599

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

summarized, 603

two-minute drill, 604

using system-switch-mail command to switch systems, 600

post-partition installations, 106–120

configuring boot loader, 106–107

customizing baseline packages in, 108–110

network configurations during, 107–108

overview of Linux package groups, 110–120

timezones and root password setup, 107–108

power management, 74

prerequisite skills, 2–67

accessing HTTP/HTTPS URLs with text or graphical browser, 50–51

basic hardware knowledge, 4–7

books for reviewing, 2

configuring e-mail clients, 49–51

downloading Red Hat Enterprise Linux, 53–55, 60

familiarity with network services, 44–47, 59

file operation commands, 19–22

filesystem hierarchy and structure, 11–19

hard drives, 7

Intel communication channels, 5–6

knowledge of architecture, 5

lab questions and answers, 63, 65–67

Linux editors, 8–11

network security, 47–48, 59

preparing for RHCE and RHCT exams, 2–3

printing, 25–26, 58

RAM requirements, 6–7, 76

security, 30–34, 58

self test and answers, 61–62, 64–65

shells, 26–30, 58

summarized, 55–56

system administration, 34–38, 58–59

TCP/IP networking, 38–43, 59

two-minute drill, 57–60

Unix-type operating systems and, 3

URL access via lftp command, 51–53

Pretty Good Privacy (PGP), 810

Primary ATA (PATA), 810

Primary Domain Controller (PDC), 810

printers. See also CUPS; Red Hat Printer Configuration tool

adding, 26

adding CUPS printer class, 351, 352

allowing user access to Samba shared, 530

attaching to parallel ports, 77

checking shared Samba directories and, 520–521

controlling with LPD commands, 347–349

verifying CUPS sharing for, 351–353

printing. See also CUPS

basic commands for, 26

configuration options in SELinux Management Tool for, 713

configuring Samba client print services, 523

prerequisite skills for, 25–26, 58

private key, 621, 811

/proc files, 380–383, 811

processes

First Boot, 120–126

listing running, 24

procmail, 586

ps command, 24

public access shares for Samba servers, 540–541

public key, 621–622, 811

Pup (Package Updater), 236, 811

pvcreate command, 417, 418, 811

pvdisplay command, 811

PVs (physical volumes)

adding with GUI LVM tool, 429, 430

commands for managing, 420

creating, 418–419

defined, 810

pwd command, 20