Index_U

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U

UIDs (user IDs), 228

umask command, 29-30

umask variable, 26, 665

umount command, 240-241

units, 101

Universal Serial Bus (USB), 48, 54, 345

Unix

history of, 426

Linux as clone of, 235

list of Unix-style distributions, 198

up2date, 135, 611, 613

updates

adding with Red Hat Package Manager, 251-252

host security, 612-613

upgrade mode, rpm command, 250

upgrades, kernel, 323-325

USB (Universal Serial Bus), 48, 54

USB Support, kernel options, 345

user accounts

adding directly, 222-223

adding users to groups, 223-224

adding with Red Hat User Manager, 227-228

categories, 221

chage command and, 231

configuring during Red Hat installation, 135

limiting access to su account, 231-232

management tips for, 228

methods for adding, 220-221

modifying, 229-230

password assignments, 225

self test, answers, 290

self test, questions, 283

services running under own, 663-664, 703, 706, 710

two-minute drill, 279

useradd command, 224

userdel command, 229

usermod command, 231

user configuration files, 32

user environment, 232-234

/etc/skel directory, 233-234

home directories, 233

self test, answers, 290

self test, questions, 283

two-minute drill, 279

window manager configuration, 234

user interfaces. See shells

User Manager. See redhat-config-users

User Private Group scheme, 228, 662, 665

useradd command, 224

user-based security, Web sites, 440-442

access to home directories, 441-442

commands, 440

passwords, 441

userdel command, 229

UserDir, 441-442

usermod command, 231

usernames

overview, 28

Samba user management and, 511-512

services for managing, 603

users

assigning to groups, 664-665

authorizing with PAM, 621

bash shell parameters for, 297

changing default permissions, 299

creating new, 7-8

managing Samba users, 505-507, 511-512

passwords, 29

setting quotas for, 301

shell configuration files, 300

usernames, 28

/usr/src/linux-2.4 directory, 331

/usr/src/redhat, 257

/usr/X11R6/bin, 405

/usr/X1R6/lib/X11/fonts directory, 385

usrquota option, 304

UTC, 130, 586

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