U

u command, vi text editor, 166

uClinux project, kernel and, 958

ufs file system, 384

UID (user) bit, 940

UID environment variable, 148

ulimit, /etc/profile, 423

umount command, 388, 708

umsdos file system, 383

uname -a command, 952

uncluttering windows, KDE desktop, 118

UNIX

Linux and, 5-7

print commands, CUPS, 672

printers, 677

unix password sync option, Samba, 718

unmounting NFS systems, 708

until do loop, shell scripts, 450

Unusual System Events, Log Sentry, 547-549

up2date, 403-409

Fedora system administration and, 375

update encrypted option, Samba, 718

updates

desktop panel, 89

RPMs, yum and, 179-180

server security, 909

Upgrade option, installation, 22

upgrades

installation, 25

packages, rpm command, 189-190

uploading

vsFTPd anonymous users, 769

vsFTPd local users, 769

URLs (Uniform Resource Locators), Web sites, 314-315

Konqueror, 113

protocols, 315

USB devices

installation and, booting from, 43

kernel and, 957

storage, digital cameras, 306

user accounts, vsFTPd configuration, 767

User Agreement, ISPs, 901-902

User Data tab, User Manager, 430

user ID

/etc/user/passwd file, 414

login session and, 130

user interfaces, operating systems and, 6

User Manager

account modification, 429-430

adding users, 416-418

deleting accounts, 432

full name, 417

groups, 417

home directory, 417

login shell, 417

opening, 416

password, 417

tabs

Account Info, 430

Groups, 430

Password Info, 430

User Data, 430

user name, 417

user name

command line completion, 141

login session and, 130

User Manager, 417

user services, 1027

finger server, 1028

remote user identification, 1029

talk server, 1028

write-to-all server, 1029

useradd command, 412-416

defaults, options for, 420

user-defined chain, iptables firewall rules, 534

userdel command, 431-432

UserDir directive, httpd.conf, 795

user-level security, netatalk volumes, 938

usermod command, 428-429

username map option, Samba, 718

usernames

numbers in, 413

Samba, 713

users

account setup, 411

passwords, 413

User Manager, 416-418

useradd command, 412-416

accounts

deleting, User Manager, 432

deleting, userdel command, 431-432

modifying, User Manager, 429-430

modifying, usermod command, 428-429

anonymous, NFS sharing and, 698

defaults, 418-424

.bashrc file, 421

.tcshrc file, 422

initial login scripts, 420

shells, system-wide configuration, 422-423

directories, httpd.conf (Apache Web server) configuration, 794-802

/etc/group file, 414

/etc/passwd file, 414

/etc/profile file, 151

FTP, 764

groups, User Manager, 417

guest account, Samba, 711-713

guests, netatalk, 933

httpd.conf (Apache Web server) configuration, 789

mail, sending to all, 438-439

multiple, 8

MySQL, 866-867

MySQL databases, 892

adding, 892-894

granting access, 892-894

revoking access, 894

netatalk setup, 933-936

passwords, 413, 427

profiles, setting, 423-424

Samba

adding, 725

smb.conf file, 725

SELinux, 963

single user need for login, 80

support, technical support mailbox, 426

Users & Groups window, administration and, 365

/usr directory, 156

/usr/local/bin directory

commands, 136

/usr/sbin directory, 366

utilities

document format conversion, 239

graphics format conversion, 239

uucp login, 372