S

SAD (security association database), 705

Samba, 745, 761

authentication

mode, 764

server, 764

checking for installation, 762

client setup, 779–782

configuration, 763–766

SWAT, 766–775

domain master, 773

encrypt passwords setting, 770

files, smb.conf, editing, 775–778

global settings, SWAT, 768–773

guest accounts, 770–771

hosts allow setting, 771

hosts deny setting, 771

interfaces setting, 769

Kerberos Realm, 764

local master, 773

Mac OS X and, 986, 990–991

netbios alias setting, 768

netbios name setting, 768

packages, listing, 762

passwords, 763

encrypted, 765

permissions, testing, 778

preferred master, 773

realm settings, 768

security, 763

security setting, 769

server, troubleshooting, 782–784

server string setting, 769

shared directories

status checking, 778

SWAT, 774–775

using from Linux, 779–780

using from Windows, 780–782

sharing, 765

SMB clients , 741

starting, 778

username, 765

users

adding, 777

guest account, 765

guest user account, 763

smb.conf file, 777

workgroup settings, 768

Samba window, Server Settings, 419

scanners , SANE (Scanner Access Now Easy), 284–285

scp command, 408, 606–609

Screen section, xorg.conf file, 144

scripts, atalk (startup), 995

searches

Firefox, 373

vi text editor, 187

security

DDOS (Distributed Denial of Service), 609–610, 613–618

DOS (Denial of Service), 609–613

encrypted, 583

Firefox, 374, 380–381

firewalls, 584

intrusion attacks, 596–599, 610, 618–621

iptables configuration, 587–598

log file intrusions, 599–606

NSA (National Security Agency), 459

passwords, 580–583

Samba, 763

Samba global settings options, 769–771

shadow password file, 582

checking for, 583–584

SSH, 606–609

symmetric crypography, 622

security enhancement, SELinux, 459

Security Level window, administration and, 420

security option, Samba, 769

SELinux, 458, 621, 1040

enabling, 462–463

Fedora Core and, 461

identities, 460

installation, 462

policies, 460

seaudit , 461

seinfo, 461

selinux-doc, 462

selinux-policy-mls, 462

selinux-policy- targeted , 462

sesearch, 461

setools , 462

status checking, 463–466

system-config-securitylevel , 461

users, 460

Sendmail, Mac OS X and, 986

sequential access, magnetic tape backups , 548

server schannel option, Samba, 770

Server Settings window, administration and, 418

server string option, Samba, 769

server users, 470

ServerLayout section, xorg.conf file, 144

servers

Arpwatch server, 1027

configuration, 739–742, 965

configuration (slapd.conf), 887–890

DHCP, 1028

DNS, 1029

firewalls, 966

FTP server, 965

hardware and, 32

information servers, 1028

installation and, 43

LDAP, 1029

logs, 967

mail servers, 965

network administration, 1027

network servers, 9

networking, 964–965

NIS (Network Information System), 1028

NTP (Network Time Protocol) server, 1027

package installation, 887

portmap server, 1027

Rackspace.com, 958

RARP, 1029

Samba, troubleshooting, 782–784

security, 966

SNMP (Simple Network Management Protocol), 1028

SWAT (Samba Web Administration Tool), 1027

updates, 967

user accounts, 483–484

Web servers, 965

Service Configuration window, runlevel scripts and, 528

Services window, Server Settings, 419

Set Root Password, installation and, 27

setkey command, VPNs, IPsec setup, 706

sftp command, 606–609

share option, Samba, 769

shared directories

Samba

mounting in Linux, 779

status check, 778

using from Linux, 779–780

using from Windows, 780–782

SWAT, 774–775

sharing

file systems, NFS, 748–755, 760–761

Samba, 765

shell

aliases, 156

arguments, 153

BASH, 166

BASH_EUID, 166

BASH_VERSION, 166

built-in, 156

configuration, 172

environment variables , 165–168

exiting, 152

FCEDIT, 166

file system, 156

functions, 156

Help, 155

help command, 155

--help command, 155

HISTFILE, 166

HISTFILESIZE, 166

history, 157

HOME, 166

HOSTTYPE, 166

MAIL, 166

man command, 155

metacharacters, 154, 178

OLDPWD, 166

options, 153

OSTTYPE, 166

PATH, 166

PATH command, 155

prompt, 148

PROMPT_COMMAND, 167

PS1, 167

PWD, 167

RANDOM, 167

rerunning, 157–162

reserved words, 156

SECONDS, 167

SHLVL, 167

Terminal window and, 148

TMOUT, 167

type, 156

UID, 167

shell scripts, 501

arithmetic, 505

backup example, 515

comments, 502

executing, 502–503

for do, 510–511

if then statements, 506–509

name, 502

overview, 501

special variables, 504

telephone list example, 514–515

variables, 503–504

while do, 511

Side Pane option, 96

sidebar, Nautilus, 112

slideshows, gThumb, 359

SMB (Server Message Block) protocol, 761

SMB daemon, starting, 778

SMB protocol, 745, See also Samba

smb.conf file, Samba, 740–741

editing, 775–778

users, adding, 777

smbstatus command, 778

SNMP (Simple Network Management Protocol), enabling, 707

soa record, /etc/named.conf file, 979

soft mounting, NFS file systems, 758

software

commercial, RHEL, 1043

free, 22

SONiX PC Cameras , 348

Sony digital cameras as storage device, 361

sound

audacity, 323

SoX utility support, 334–335

Sound Juicer, 336

CDs, 336–338

Soundcard Detection window, administration and, 420

soundcards

configuration, 316

input/output ports, 317

microphone, 317

setup, 322

SourceForge Web site, application download, 193

SoX, audio file conversion tool, 334–336

.sph files, Sox utility, 335

SQL (structured query language), 923

Squid, 707

debugging and, 715–716

/etc/squid/squid.conf file, 709–711, 715

squid.conf file, 711

squirrelmail.conf file, Apache Web server, 872

ssh command, 407, 606–609

SSH server, port number, 966

ssh service, no-password login setup, 544

star topology, LANs, 636

StarOffice, 255

StarOffice Base, 255

StarOffice Calc, 255

StarOffice Draw, 255

StarOffice Impress, 255

StarOffice Writer, 255

static IP addresses, 662

STMicroelectronics Webcams, 348

strings, background processes, 170

striping, RAID disks, 447

su command (superuser), 414–416

subtree checking, NFS file sharing and, 749

. sunau files, Sox utility, 335

support, 1044

suversion.conf file, Apache Web server, 872

swap file system, 438

SWAT (Samba Web Administration Tool)

configuration and, 766–775

configuration, shared directories, 774–775

global settings, 768

base options, 768

browse options, 772–773

logging options, 771

printing options, 772

security options, 769–771

WINS options, 773

Sylpheed mail client, 384

system administration

commands, 421

computer usage, 452–453

configuration files, 421–426

CPU usage, 453

graphical tools, 417–420

kudzu, 430–431

laptop power usage, 454–456

listing loaded, 431–432

loading, 432–433

log files, 426

mail, 457–458

module configuration, 431

performance monitoring, 452

removing, 433

sudo, 427–429

up2date, 203–206

system administrators, 413

Macintosh users and, 985

system initialization

boot loader startup, 516

/etc/inittab file, 516

format, 517–519

hardware boot, 516

kernel boot, 516

line breakdown, 519–521

system initialization shell scripts, 501

System Monitor window, administration and, 420

system performance, Linux system administration, 429

system profiles, setting, 482

system startup/shutdown

adding, 529

behavior changes, 527

reorganization, 528–529

run-level scripts, 521–525

scripts, 525–527

xinetd, 530

system tasks

at.allow and, 533

cron command, 536–540

cron files, 539

crontab, 538

scheduled jobs, 536

scheduled jobs deletion, 535

scheduled jobs submission, 534–535

scheduled jobs view, 535

when jobs run, 533–534

system-config-bind package, 971