caching-only DNS name servers, 561, 563–565, 801
canonical names (CNAME), 802
case insensitivity of DNS, 568
cat command, 21, 29
cd command, 20
CDs/DVDs
avoiding exam installation from CDs, 89
booting from installation, 91–92
creating installation, 89–90
initial booting from, 89
using linux rescue environment from installation, 735, 736–738
certificates
Dovecot secure, 591
server, 466
chage command, 283–284, 801
chattr command, 801
chcon command, 709
chgrp command, 801
chkconfig command, 167, 169, 619, 801
chmod command, 30–31, 801
chown command, 801
chroot_local_user=YES command, 514
CIDR (Classless Inter-Domain Routing) notation, 618
CIFS (Common Internet File System), 494, 519, 801
classes
adding CUPS printer, 351, 352
IP address, 39, 40
Classless Inter-Domain Routing (CIDR) notation, 618
clients. See also DNS clients; e-mail clients; NFS clients; Samba clients
Apache, 446
configuring with Red Hat Authentication Configuration tool, 316–317
defined, 802
DHCP, 340, 627, 631, 632–633
e-mail, 600–602
finding MAC addresses for DHCP, 631
LDAP for configuring, 314–315
NIS for configuring, 314
NTP, 634–635
Samba, 520–523
sharing NFS directories with, 509–512
SSH, 626
starting display from remote, 675–676
troubleshooting NFS hangs, 503–504
working with symbolically linked files, 503
X Window System, 651–653, 655–657, 667, 669, 817
CNAME (canonical name), 802
command line
adding users from, 276, 277
backslash in, 305
configuring LVM in text mode, 418
controlling services from, 167
DHCP configuration from, 627
editing Apache configuration files from, 475
GRUB, 155–157
managing users from, 283–284
mounting NFS directory from client with, 510
network configuration from, 333
NFS configurations from, 506
NTP configuration not recommended from, 634
registering for Red Hat Network from, 235–236
Samba global setting configurations from, 537
setting disk quotas from, 291
testing mail system from, 600–601
tools for user administration using, 274–277
troubleshooting skills from, 748
using mail utility at, 49–50, 600–601
virtual consoles as, 160
X client options from, 655–657
X Window configuration tools from, 673
command mode in vi, 9–10
command shell. See shells
commands. See also mount command
administrative, 24–25
alternatives, 599
apachectl, 448, 800
arp, 339–340, 800
at, 358, 359, 800
available in no mount linux rescue environment, 741
awk, 24
basic print, 26
bzip2, 37–38
cat, 21, 29
cd, 20
chage, 283–284, 801
chattr, 801
chcon, 709
chgrp, 801
chkconfig, 167, 169, 619, 801
chmod, 30–31, 801
chown, 801
converting passwords to and from shadow files, 33–34
cp, 22
crontab, 36
df, 185–186, 751–752
dhclient, 632
dig, 575–576
dmesg, 29, 803
dumpe2
fs, 754, 755, 803
e2label, 753–754, 755, 803
edquota, 294–298, 803
egrep, 23
env, 27
exportfs, 804
fdisk, 14, 15, 16, 186–187
find, 21, 804
fsck, 14, 17, 740, 755, 804
getfacl, 805
grep, 23
GRUB editing, 149
grub-install, 805
gzip, 37–38
head and tail, 22
host, 575
hosts.allow and hosts.deny, 694
hotswappable devices, 79–80
htpasswd, 805
ifconfig, 42, 333, 337–338, 339, 742, 743, 806
ifup/ifdown, 333, 337
installation console, 128
ip6tables, 698
ipchains, 693
iptables, 48–49, 482, 698–700, 806
less, 21, 29
lftp, 51–53, 807
linux askmethod, 92, 93
ln, 22
locate, 21, 23, 807
lpc, 807
lpc status, 348
LPD, 347–349
lpq, 26, 348, 807
lpr, 26, 348, 808
lprm, 26, 349, 808
ls, 20
ls -Z, 706, 707
lsattr, 808
lvcreate, 417, 808
lvdisplay, 808
lvextend, 418, 808
lvremove, 808
make config, 397–398
make gconfig, 398–400
make help, 409
make menuconfig, 398, 399
make xconfig, 398, 399
man smb.conf, 529
mdadm, 808
mkbootdisk, 809
mkfs, 14, 15–17, 198–199, 755, 809
mklabel, 191, 194
modprobe, 383–384, 809
more and less, 21
mount, 18–19, 185–186, 202, 203, 521–522, 809
mount.cifs, 522, 809
mv, 22
netstat, 42, 338–339, 340, 809
nslookup, 575
partprobe, 195, 810
passwd, 32
ping, 41–42
print, 26
ps, 24
pvcreate, 417, 418, 811
pvdisplay, 811
pwd, 20
quota management, 294
quotacheck, 293, 294, 298, 811
quotaon, 811
repquota, 812
rescue, 90
resize2fs, 813
rndc, 575, 813
rpm -i kernel.rpm, 389, 390
rpm query, 228
rpm -U kernel.rpm, 389, 390
rpmbuild, 231, 813
sed, 23–24
service, 35
service httpd reload, 448
set, 29
setenforce, 708
setfacl, 814
showmount, 814
smbmount, 522
smbpasswd, 533, 534, 535, 814
smbumount, 522
sort, 23
startx, 666–669
su, 34
sudo, 34
switchdesk, 680–681, 746
switches for, 19
sync, 740
system-config-*, 815
system-config-display, 651
system-config-network, 334–336
system-config-samba, 536–537
system-config-securitylevel, 701
tar, 38
tmpwatch, 816
umask, 32, 816
umount.cifs, 522, 809
updatedb, 21, 23
useradd, 276, 277
usermod, 283, 816
vgcreate, 417, 816
vgdisplay, 816
vgextend, 418, 816
volume and volume group, 420–422
vsFTP configuration, 514
wc, 23
who and w, 24–25
xhost, 818
yum, 223, 238–241, 818
Common Internet File System (CIFS), 494, 519, 801
Common Unix Printing System. See CUPS
communication channels, 5–6
compatibility
computer, 71–72
CPUs, 75
hardware, 70–74
Hardware Compatibility List, 72
media devices and filesystem, 12
compressing files, 37–38
computers
effect of multiple controllers on older BIOS, 105
hard drive options for Linux, 7
Linux compatibility with, 71–72
planning IRQ layout for, 6
protecting, 693, 735
RAM requirements, 6–7, 76
updating kernel developments for SMP, 75
.config file, 396–397
configuration files
allowing Web server to run while reading changes to, 448
Apache, 450–451
backing up before editing, 293–294
booting system, 169–172
CUPS, 342
DNS client, 560
DNS server, 561–563
editing Samba, 523–524
/etc/exports for NFS servers, 497
/etc/pam.d/system-auth, 309
/etc/sysconfig/network, 331–332
finding errors in GRUB, 152–155
importance of DNS, 574
kickstart, 245
PAM, 306
Postfix main.cf, 598
sendmail, 592–593
shell, 287–290
Squid, 478–480
/tmp directory, 129
troubleshooting likely errors in, 730–731
using Red Hat Domain Name
Service configuration tool with, 576
window manager, 287
xinetd, 616–618
X.org server, 658
Connect to CUPS Server dialog box, 343–344
consoles
installation, 127–129
virtual, 160
control flags for PAM, 306, 307
controllers for PC cards, 78
controlling services, 167–169
from command line, 167
Service Configuration tool for, 168–169
text-based services for, 168
verifying runlevel of activated service, 169
copying files, 22
cp command, 22
cpuinfo file, 381–382
CPUs
compatible, 75
detecting information about with cpuinfo file, 381–382
dual- and multi-core, 803
RPM packages for specific types of, 223
virtualization and, 76
crackers
defined, 32
preventing spoofing by, 572
reviewing logins for activity by, 274
Create New Logical Volume dialog (GUI LVM Management tool), 427
Create New Samba User dialog (Samba Server Configuration utility), 541
Create New User dialog (Red Hat User Manager), 279–280
Create Samba Share dialog (Samba Server Configuration utility), 539
cron daemon
about, 36, 354, 802
creating job settings, 357–358
routing messages with MAILTO variable, 355
securing, 359–360
SELinux settings for, 357
setting up for users, 357
using crontab file, 355–357
crontab command
defined, 802
managing cron jobs with, 36
crontab file, 355–357
CUPS (Common Unix Printing System), 341–354
about, 25–26, 330
Administration tab for, 350–351
configuration files for, 342
controlling with LPD commands, 347–349
defined, 802
installing and starting, 341
SELinux protection and, 354
tabs of, 349–350
using Red Hat Printer
Configuration tool, 342–347
verifying sharing, 351–353
Web-based interface for, 349–351
cylinders. See also hard drives
BIOS limits on reported, 105
defined, 96
Cyrus IMAP, 586