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Index: U

-u flag : (apache) 2.1.1. Running Apache from the Command Line (Apache: The Definitive Guide)
uasort( ): 5.8.1. Sorting One Array at a Time (Programming PHP)
A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
UCASE( ) function: 17.2.2. General Functions (Managing & Using MySQL)
ucfirst( ): 4.4.2. Changing Case (Programming PHP)
A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
ucwords( ): A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
4.4.2. Changing Case (Programming PHP)
UDFs (user-defined functions): 14.1. User-Defined Functions (Managing & Using MySQL)
aggregate functions: 14.1. User-Defined Functions (Managing & Using MySQL)
14.1.2. Aggregate Functions (Managing & Using MySQL)
example of: 14.1.2.6. Aggregate example (Managing & Using MySQL)
calling: 14.1.3. Calling a UDF (Managing & Using MySQL)
loading: 14.1.3. Calling a UDF (Managing & Using MySQL)
standard functions: 14.1.1. Standard Functions (Managing & Using MySQL)
UDP (User Datagram Protocol): 1.3.1. What to Know About TCP/IP (Apache: The Definitive Guide)
2.3. Overview of TCP/IP (Linux in a Nutshell)
15.1.1. TCP/IP Concepts (Running Linux)
uid field (passwd file): 5.7.1. The passwd File (Running Linux)
uid variable (tcsh): 8.4.3. Predefined Shell Variables (Linux in a Nutshell)
UIDs (user IDs), NFS, NIS and: 15.5.1. Configuring NFS (Running Linux)
uksort( ): 5.8.1. Sorting One Array at a Time (Programming PHP)
A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
ul command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
ulimit command (bash): 7.7. Built-in Commands (Linux in a Nutshell)
ultra-thin clients: 8.1.1.2. Fat and thin clients (Managing & Using MySQL)
umask( ): 12.4.1. Get It Right the First Time (Programming PHP)
A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
bash: 7.7. Built-in Commands (Linux in a Nutshell)
ftp: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
tcsh: 8.9. Built-in Commands (Linux in a Nutshell)
umount command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
6.1.2. Mounting Filesystems (Running Linux)
UMSDOS filesystem: 6.1.1. Filesystem Types (Running Linux)
unabbreviate command (ex): 11.14. Alphabetical Summary of ex Commands (Linux in a Nutshell)
"unable to get hostbyname" error: 2.3. Setting Up a Unix Server (Apache: The Definitive Guide)
unalias command
bash: 7.7. Built-in Commands (Linux in a Nutshell)
tcsh: 8.9. Built-in Commands (Linux in a Nutshell)
uname command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
7.4. Building a New Kernel (Running Linux)
uname2id( ): A.6.13. User and Group Functions (Apache: The Definitive Guide)
unary operators: 2.4.1. Number of Operands (Programming PHP)
- (arithmetic negation) operator: 2.4.5. Arithmetic Operators (Programming PHP)
autoincrement and autodecrement: 2.4.7. Autoincrement and Autodecrement Operators (Programming PHP)
unblock_alarms( ): A.6.16. Timeout and Alarm Functions (Apache: The Definitive Guide)
uncomplete command (tcsh): 8.9. Built-in Commands (Linux in a Nutshell)
uncompress command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
uncompress program: 7.1.1. Using gzip and bzip2 (Running Linux)
uncompressing and extracting PHP and Apache distributions: 1.3. Installing PHP (Programming PHP)
uncompressing and paging (zmore): 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
uncompressing files: 7.1.1. Using gzip and bzip2 (Running Linux)
Undefined subroutine: &Apache::ROOT::perl::test_2epl::some_function called at, message: 22.3.8. Undefined subroutine &Apache::ROOT::perl::test_2epl::some_function called at (Practical mod_perl)
underlining text in PDF files: 10.3.3. Text Attributes (Programming PHP)
underscore (_), pattern matching character: 3.8.4. Pattern Matching (Managing & Using MySQL)
undo command (Emacs): 11.6.2. Emacs and Other Editors (Running Linux)
undo command (ex): 11.14. Alphabetical Summary of ex Commands (Linux in a Nutshell)
undoing edits (vi editor): 9.1.3. Deleting Text and Undoing Changes (Running Linux)
unedit command (CVS): 15.6.7. User Commands (Linux in a Nutshell)
unescape_url( ): A.6.12. Path, Filename, and URL Manipulation Functions (Apache: The Definitive Guide)
unexpand command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
unformatted menus: 7.4. Image Map Directives (Apache: The Definitive Guide)
unhash command (tcsh): 8.9. Built-in Commands (Linux in a Nutshell)
unhide command
ex: 11.14. Alphabetical Summary of ex Commands (Linux in a Nutshell)
GRUB: 4.4.1. Command-Line and Global Menu Commands (Linux in a Nutshell)
Unicode
character encodings supported by XML parser: 11.3.6.1. Character encoding (Programming PHP)
FriBiDi extension, reordering strings for encoded character set: B.1. Optional Extensions Listing (Programming PHP)
Unicode filesystem compatibility: 6.1.1. Filesystem Types (Running Linux)
unicode_start command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
unicode_stop command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
Uniform Resource Identifers (see URIs, length limitations)
Uniform Resource Locators (URLs): 16.1. The World Wide Web (Running Linux)
UNION clause: 3.9.6. Unions (Managing & Using MySQL)
15.2. SQL Commands (Managing & Using MySQL)
union of two sets: 5.10.1. Sets (Programming PHP)
uniq command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
uniqid( ): A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
UNIQUE attribute: 15.2. SQL Commands (Managing & Using MySQL)
EXPLAIN SELECT command and: 5.2.2.2. EXPLAIN SELECT (Managing & Using MySQL)
unique connections, Apache::DBI module and: 20.1.2. When to Use Apache::DBI (and When Not to Use It) (Practical mod_perl)
unique identifiers
for entities: 7.2.2. The Unique Identifier (Managing & Using MySQL)
managing users: 6.3.1.1. User management (Managing & Using MySQL)
translating into primary key columns: 7.4. Physical Database Design (Managing & Using MySQL)
unique indexes, performance benefits of: 5.2.2.1. Index guidelines (Managing & Using MySQL)
unique_id_child_init( ): 21.3. The Module Structure (Apache: The Definitive Guide)
UNIREG (database tool): 1.2. The History of MySQL (Managing & Using MySQL)
Unix
configuring mod_perl: 2.3. Configuring and Starting the mod_perl Server (Practical mod_perl)
installing mod_perl, unpacking source code: 2.2.1. Obtaining and Unpacking the Source Code (Practical mod_perl)
installing PHP: 1.3. Installing PHP (Programming PHP)
locale system in POSIX-style regular expressions: 4.9. POSIX-Style Regular Expressions (Programming PHP)
protocol for databases: 8.3.1. Data Source Names (Programming PHP)
server rebooting, SysV init system: 5.7. Preparing for Machine Reboot (Practical mod_perl)
shell scripting languages, comments in: 2.1.4.1. Shell-style comments (Programming PHP)
writing portable PHP code for: 15.2. Writing Portable Code for Windows and Unix (Programming PHP)
determining the platform: 15.2.1. Determining the Platform (Programming PHP)
end-of-file handling: 15.2.8. End-of-File Handling (Programming PHP)
end-of-line handling: 15.2.7. End-of-Line Handling (Programming PHP)
environment information: 15.2.3. The Environment (Programming PHP)
extensions: 15.2.10. Common Platform-Specific Extensions (Programming PHP)
paths, handling: 15.2.2. Handling Paths Across Platforms (Programming PHP)
remote files: 15.2.6. Remote Files (Programming PHP)
sending mail: 15.2.4. Sending Mail (Programming PHP)
server-specific functions: 15.2.5. Server-Specific Functions (Programming PHP)
shell commands: 15.2.9. External Commands (Programming PHP)
Unix, compared to Linux: 1. Introduction (Linux in a Nutshell)
Unix, history of: 1.2. A Brief History of Linux (Running Linux)
Unix operating system
configuring server: 2.3. Setting Up a Unix Server (Apache: The Definitive Guide)
DBM files: 5.10. DBM Files on Unix (Apache: The Definitive Guide)
making Apache: 1.10.6. Making Apache (Apache: The Definitive Guide)
multiple IP addresses: 1.3.3.1. Multiple sites: Unix (Apache: The Definitive Guide)
passwords: 5.3. Passwords Under Unix (Apache: The Definitive Guide)
permissions: 2.3.5. Unix Permissions (Apache: The Definitive Guide)
restarting Apache: 3.6. Restarts (Apache: The Definitive Guide)
security and: 11. Security (Apache: The Definitive Guide)
suEXEC wrapper: 16.6. suEXEC on Unix (Apache: The Definitive Guide)
versions of: 1.6.3. Which Unix? (Apache: The Definitive Guide)
Unix shell command (sh): 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
Unix systems
configuration files on: 4.1.1. File Locations (Managing & Using MySQL)
error logs on: 4.3.1. The Error Log (Managing & Using MySQL)
installing MySQL on: 2.2. Unix Installation (Managing & Using MySQL)
installing PHP on: 11.2. Installing PHP (Managing & Using MySQL)
server startup/shutdown: 4.2.1. Unix/Linux (Managing & Using MySQL)
shared libraries on: 14.1.3. Calling a UDF (Managing & Using MySQL)
UNIX_TIMESTAMP( ) function: 3.9.4. Functions (Managing & Using MySQL)
17.2.2. General Functions (Managing & Using MySQL)
unlimit command (tcsh): 8.9. Built-in Commands (Linux in a Nutshell)
unlink( ): 3.1. Calling a Function (Programming PHP)
A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
UNLOCK statement: 3.9.3. Table Locking (Managing & Using MySQL)
15.2. SQL Commands (Managing & Using MySQL)
unmap command (ex): 11.14. Alphabetical Summary of ex Commands (Linux in a Nutshell)
unpack( ): A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
unpacking Apache and PHP source distributions: 1.3. Installing PHP (Programming PHP)
unpacking source code: 2.2.1. Obtaining and Unpacking the Source Code (Practical mod_perl)
unparsed XML entities: 11.3.4. Entity Handlers (Programming PHP)
unrecognized format specifier errors: 3.2.2.2. Unrecognized format specifier for... (Practical mod_perl)
unregister_tick_function( ): A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
unserialize( ): A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
unset( ): A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
2.3.4. Garbage Collection (Programming PHP)
bash: 7.7. Built-in Commands (Linux in a Nutshell)
tcsh: 8.9. Built-in Commands (Linux in a Nutshell)
unsetenv command (tcsh): 8.9. Built-in Commands (Linux in a Nutshell)
unshar command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
UNSIGNED attribute: 3.4. MySQL Data Types (Managing & Using MySQL)
unstr command (see strfile command)
untie( ) calls, locking and: 19.3. Flawed Locking Methods (Practical mod_perl)
until command (bash): 7.7. Built-in Commands (Linux in a Nutshell)
up command (lpc): 8.4.12. Controlling Printer Services with lpc (Running Linux)
update command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
CVS: 15.6.7. User Commands (Linux in a Nutshell)
update method (Model class): 9.3.1. A Model for Relational Data (Managing & Using MySQL)
UPDATE privilege: 6.1.2.1. GRANT and REVOKE (Managing & Using MySQL)
update program: 5.5. Shutting Down the System (Running Linux)
update( ) (Publisher class): 9.3.2. Implementing the Model (Managing & Using MySQL)
9.3.2.2. Methods that build and execute SQL (Managing & Using MySQL)
UPDATE statement: 3.6.3. Updates (Managing & Using MySQL)
15.2. SQL Commands (Managing & Using MySQL)
EXPLAIN SELECT command and: 5.2.2.2. EXPLAIN SELECT (Managing & Using MySQL)
update_mtime( ), last-modified header: 16.1.2. Last-Modified Header (Practical mod_perl)
upgrade issues: 3.11.3. Should I Rebuild mod_perl if I Have Upgraded Perl? (Practical mod_perl)
upgrading
compiler: 7.2.2. Upgrading the Compiler (Running Linux)
general procedure: 7.3. General Upgrade Procedure (Running Linux)
kernel patches: 7.4.1.2. Applying patches (Running Linux)
libraries: 7.2.1. Upgrading Libraries (Running Linux)
software
non-RPM: 7.3.3. Upgrading Other Software (Running Linux)
overview: 7.2. Upgrading Software (Running Linux)
upgrading server
CVS and: 5.8.2.2.7. Using CVS for code upgrades (Practical mod_perl)
Internet cluster servers: 5.8.2.1. The server cluster (Practical mod_perl)
Internet single servers: 5.8.2.2. The single server (Practical mod_perl)
Intranet servers: 5.8.1. Upgrading Intranet Servers (Practical mod_perl)
overview: 5.8. Upgrading a Live Server (Practical mod_perl)
Perl code: 5.8.2.2.5. Upgrading Perl code (Practical mod_perl)
port forwarding: 5.8.2.2.2. Upgrading a live server with port forwarding (Practical mod_perl)
prepackaged components: 5.8.2.2.3. Upgrading a live server with prepackaged components (Practical mod_perl)
reusing configuration parameters: 3.1.5. Reusing Configuration Parameters (Practical mod_perl)
scripts and handlers: 5.8.2.2.6. Moving files and restarting the server (Practical mod_perl)
swapping live and backup servers: 5.8.2.2.1. Upgrading live server components by swapping machines (Practical mod_perl)
symbolic links: 5.8.2.2.4. Upgrading a live server using symbolic links (Practical mod_perl)
uploaded files
information about: 7.2. Variables (Programming PHP)
moving: A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)
uploading files: 12.15. Uploading and Downloading Big Files (Practical mod_perl)
7.4.8. File Uploads (Programming PHP)
security and: 12.3. File Uploads (Programming PHP)
distrusting browser-supplied filenames: 12.3.1. Distrust Browser-Supplied Filenames (Programming PHP)
UPPER( ) function: 17.2.2. General Functions (Managing & Using MySQL)
uppermem command (GRUB): 4.4.2. Command-Line and Menu Entry Commands (Linux in a Nutshell)
uptime command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
URI translation (Apache request processing): 1.4. Apache 1.3 Request Processing Phases (Practical mod_perl)
uri_components structure: A.6.23. URI Functions (Apache: The Definitive Guide)
URIs, length limitations: 1.1.3. Apache CGI Handling with mod_cgi (Practical mod_perl)
URIs (uniform resource identifiers): 1.1. What Does a Web Server Do? (Apache: The Definitive Guide)
API functions: A.6.23. URI Functions (Apache: The Definitive Guide)
URL rewriting, storing state information: 7.6. Maintaining State (Programming PHP)
urldecode( ) function: 4.5.2.2. Query-string encoding (Programming PHP)
urlencode( ): 4.5.2.2. Query-string encoding (Programming PHP)
11.6. Writing Data with PHP (Managing & Using MySQL)
9.6. Dynamically Generated Buttons (Programming PHP)
A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
URLs
1.1. What Does a Web Server Do? (Apache: The Definitive Guide)
1.4. How HTTP Clients Work (Apache: The Definitive Guide)
API functions: A.6.12. Path, Filename, and URL Manipulation Functions (Apache: The Definitive Guide)
decomposing (parse_url( ) function): 4.7.4.4. Decomposing URLs (Programming PHP)
digest authentication: 5.1. Authentication Protocol (Apache: The Definitive Guide)
5.11. Digest Authentication (Apache: The Definitive Guide)
encoding/decoding: A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
encoding/decoding strings as: 4.5.2. URLs (Programming PHP)
button strings: 9.6. Dynamically Generated Buttons (Programming PHP)
extracting from HTML page: 4.10.13.1. Matching (Programming PHP)
functions for: A.1. PHP Functions by Category (Programming PHP)
GET and POST requests: 7.4.1. Methods (Programming PHP)
https://: 7.7. SSL (Programming PHP)
imagemaps: 7.4. Image Map Directives (Apache: The Definitive Guide)
importance of fully qualified: 12.3. One Plain and One mod_perl-Enabled Apache Server (Practical mod_perl)
limiting directives to: 3.3. Block Directives (Apache: The Definitive Guide)
opening remotely with PHP functions, security risks of: 12.2. Filenames (Programming PHP)
parse_url( ) function: A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)
redirecting upon errors: 3.1.1. ErrorDocument (Apache: The Definitive Guide)
rewriting: 8.2. Rewrite (Apache: The Definitive Guide)
session IDS, passing via: 7.6.2.2. Alternatives to cookies (Programming PHP)
spell-checking: 8.3. Speling (Apache: The Definitive Guide)
translating to names: 21.3. The Module Structure (Apache: The Definitive Guide)
US-ASCII (see ASCII)
USAGE privilege: 6.1.2.1. GRANT and REVOKE (Managing & Using MySQL)
USB devices, support: 12. Windows Compatibility and Samba (Running Linux)
use( ), server startup file: 4.3.4. The Confusion with use( ) in the Server Startup File (Practical mod_perl)
USE INDEX option: 5.2.2.3. Other options (Managing & Using MySQL)
Use of unitialized value at (eval 80) line 12, message: 22.3.7. Use of uninitialized value at (eval 80) line 12 (Practical mod_perl)
USE statement: 15.2. SQL Commands (Managing & Using MySQL)
USE_APACI configuration parameter: 3.1.1. Controlling the Build Process (Practical mod_perl)
USE_APXS configuration parameter: 3.1.1. Controlling the Build Process (Practical mod_perl)
UseCanonicalName directive: 3.4. Other Directives (Apache: The Definitive Guide)
USE_DSO configuration parameter: 3.1.1. Controlling the Build Process (Practical mod_perl)
Usenet newsgroups: 0.. Usenet Newsgroups (Linux in a Nutshell)
user accounts
creating: 3.2.1. Creating a User Account (Running Linux)
3.2.1. Creating a User Account (Running Linux)
5.7.5. Creating Accounts (Running Linux)
deleting: 5.7.6. Deleting and Disabling Accounts (Running Linux)
disabling: 5.7.6. Deleting and Disabling Accounts (Running Linux)
management: 5.7. Managing User Accounts (Running Linux)
passwd file: 5.7.1. The passwd File (Running Linux)
5.7.1. The passwd File (Running Linux)
shadow passwords: 5.7.2. Shadow Passwords (Running Linux)
modifying: 5.7.7. Modifying User Accounts (Running Linux)
user groups: 5.7.4. The Group File (Running Linux)
User-Agent headers: 7.1. HTTP Basics (Programming PHP)
user command (ftp): 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
user data
decoding, using PHP: 11.1. Introducing PHP (Managing & Using MySQL)
securing, using PHP: 11.4. Securing User Data (Managing & Using MySQL)
User Datagram Protocol (UDP): 1.3.1. What to Know About TCP/IP (Apache: The Definitive Guide)
15.1.1. TCP/IP Concepts (Running Linux)
user-defined functions: 14.1. User-Defined Functions (Managing & Using MySQL)
3.1. Calling a Function (Programming PHP)
sorting arrays with: A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
user-defined order, sorting arrays in: 5.8.1. Sorting One Array at a Time (Programming PHP)
5.8.1. Sorting One Array at a Time (Programming PHP)
User directive: 2.3.1.1. User (Apache: The Definitive Guide)
12.6.4. Directives (Apache: The Definitive Guide)
12.6.5. Candidacy Functions (Apache: The Definitive Guide)
12.6.5. Candidacy Functions (Apache: The Definitive Guide)
12.6.5. Candidacy Functions (Apache: The Definitive Guide)
12.6.5. Candidacy Functions (Apache: The Definitive Guide)
12.6.5. Candidacy Functions (Apache: The Definitive Guide)
12.6.5. Candidacy Functions (Apache: The Definitive Guide)
USER environment variable (tcsh): 8.4.6. Environment Variables (Linux in a Nutshell)
USER( ) function: 17.2.2. General Functions (Managing & Using MySQL)
user groups and distribution packages: 2.1.1. Getting Linux via Mail Order or Other Hard Media (Running Linux)
user IDs
database security and: 6.1. Database Security (Managing & Using MySQL)
identifying users to MySQL: 6.1.2.1. GRANT and REVOKE (Managing & Using MySQL)
mysql user: 2.2.1. Binary (Tarball) Distributions (Managing & Using MySQL)
mysql_change_user( ) and: 18.2. Functions (Managing & Using MySQL)
19.2. Functions (Managing & Using MySQL)
operating system security and: 6.2.1. Operating System Security (Managing & Using MySQL)
privilege tables and: 6.1.2.2. The security tables (Managing & Using MySQL)
root user: 6.1.1. User Management (Managing & Using MySQL)
unique identifiers: 6.3.1.1. User management (Managing & Using MySQL)
user interfaces
desktop environments: 1.5.6. KDE and GNOME (Running Linux)
X Window System: 1.5.5. The X Window System (Running Linux)
user login times, tracking (ruptime): 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
user management
application servers and: 6.3.1.1. User management (Managing & Using MySQL)
roles, working with: 6.1.1. User Management (Managing & Using MySQL)
security issues for DBAs: 6.1.1. User Management (Managing & Using MySQL)
types of users: 6.1.1. User Management (Managing & Using MySQL)
user privileges in security tables: 6.1.2.2. The security tables (Managing & Using MySQL)
user property
GNU JDBC driver: 13.1.2.2. Driver manager connectivity (Managing & Using MySQL)
twz JDBC driver: 13.1.2.2. Driver manager connectivity (Managing & Using MySQL)
user table: 6.1.2.2. The security tables (Managing & Using MySQL)
primary key of: 6.1.2.2. The security tables (Managing & Using MySQL)
schema for: 6.1.2.2. The security tables (Managing & Using MySQL)
user variable (tcsh): 8.4.3. Predefined Shell Variables (Linux in a Nutshell)
useradd command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
useradd utility
binary distributions: 2.2.1. Binary (Tarball) Distributions (Managing & Using MySQL)
source distributions: 2.2.3. Source Distributions (Managing & Using MySQL)
userdel command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
UserDir directive: 8.1.1. A Subtle Problem (Apache: The Definitive Guide)
16.1.2.1. httpd.conf (Running Linux)
user_error( ): A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
usermod command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
username field (passwd file): 5.7.1. The passwd File (Running Linux)
usernames
authenticating: 7.5.4. Authentication (Programming PHP)
current, for PHP script executing: A.2b. Alphabetical Listing of PHP Functions (f-i) (Programming PHP)
security problems with: 12.2. Filenames (Programming PHP)
users
API functions: A.6.13. User and Group Functions (Apache: The Definitive Guide)
automatic information on: 5.14. Automatic User Information (Apache: The Definitive Guide)
checking if access allowed: 21.3. The Module Structure (Apache: The Definitive Guide)
creating: 2.3.1. webuser and webgroup (Apache: The Definitive Guide)
DBM files: 5.10. DBM Files on Unix (Apache: The Definitive Guide)
dummy and cron: 8.2. Scheduling Jobs Using cron (Running Linux)
finding login names for: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
home directories: 8.1.1. A Subtle Problem (Apache: The Definitive Guide)
home directories, backups: 8.1.1. Simple Backups (Running Linux)
logged in, logs: 8.3. Managing System Logs (Running Linux)
management commands: 2.1.14. Users (Linux in a Nutshell)
performance and: 7.2. Asking the Right Questions (Practical mod_perl)
permissions (see permissions)
Samba, adding: 12.2.2.3. Adding users (Running Linux)
security and: 11.1. Internal and External Users (Apache: The Definitive Guide)
virtual machines: C.4. Giving Each User a Virtual Machine (Practical mod_perl)
users command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
useUnicode property (GNU JDBC driver): 13.1.2.2. Driver manager connectivity (Managing & Using MySQL)
usleep( ): A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
usort( ): 5.8.1. Sorting One Array at a Time (Programming PHP)
A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
anonymous function, using with: 3.7. Anonymous Functions (Programming PHP)
/usr directory
/usr/lib directory: 13.1.7. More Fun with Libraries (Running Linux)
/usr/X11R6 directory: 10.3. Installing XFree86 (Running Linux)
USR1 signal: 5.3.1. kill Signals for Stopping and Restarting Apache (Practical mod_perl)
/usr/backups directory: 4.4.2. mysqlhotcopy (Managing & Using MySQL)
usr/bin directory: 4.16. Important Directories (Running Linux)
usr/include directory: 4.16. Important Directories (Running Linux)
/usr/lib directory: 14.1.3. Calling a UDF (Managing & Using MySQL)
usr/lib/X11 directory: 4.16. Important Directories (Running Linux)
usr/local directory: 4.16. Important Directories (Running Linux)
usr/sbin directory: 4.16. Important Directories (Running Linux)
usr/src directory: 4.16. Important Directories (Running Linux)
source distributions: 7.3.3. Upgrading Other Software (Running Linux)
usr/src/linux directory: 7.4. Building a New Kernel (Running Linux)
kernel sources and backups: 8.1.1. Simple Backups (Running Linux)
UTF-8 character encoding: 11.3.6.1. Character encoding (Programming PHP)
printing high-bit ASCII characters: 9.5.2. TrueType Fonts (Programming PHP)
utilities: 1.5.1. Basic Commands and Utilities (Running Linux)
4.4.1. Directories (Running Linux)
(see also commands)
amprapmon: 5.11.4. Tracking and Terminating Hanging Processes (Practical mod_perl)
ApacheBench: 9.1.1. ApacheBench (Practical mod_perl)
Apache::Recorder: 9.1.4. Other Web Server Benchmark Utilities (Practical mod_perl)
archiving and compressing files: 7.1. Archive and Compression Utilities (Running Linux)
chkconfig: 5.7. Preparing for Machine Reboot (Practical mod_perl)
fdisk: 2.2.4. Repartitioning Your Drives (Running Linux)
httperf: 9.1.2. httperf (Practical mod_perl)
http_load: 9.1.3. http_load (Practical mod_perl)
HTTP::Monkeywrench: 9.1.4. Other Web Server Benchmark Utilities (Practical mod_perl)
HTTP::RecordedSession: 9.1.4. Other Web Server Benchmark Utilities (Practical mod_perl)
HTTP::WebTest: 9.1.4. Other Web Server Benchmark Utilities (Practical mod_perl)
laptop computer support: 1.5.8. Laptop Support (Running Linux)
MTools: 12.1. Sharing Disks with MTools (Running Linux)
networking: 1.5.7. Networking (Running Linux)
overview: 1.5.1. Basic Commands and Utilities (Running Linux)
parent processes, identifying: 5.3.3. Finding the Right Apache PID (Practical mod_perl)
printing: 8.4.4. Checking Print Utilities (Running Linux)
process memory consumption monitoring: 9.3. Process Memory Measurements (Practical mod_perl)
programming: 1.5.4. Programming Languages and Utilities (Running Linux)
1.5.4. Programming Languages and Utilities (Running Linux)
text-processing: 1.5.2. Text Processing and Word Processing (Running Linux)
top, monitoring system health: 5.10.1. Interactive Monitoring (Practical mod_perl)
tpage: D.5. Processing Templates (Practical mod_perl)
ttree: D.3. Typical Uses (Practical mod_perl)
tunelp: 8.4.13. Printer Optimization (Running Linux)
user accounts, creating: 3.2.1. Creating a User Account (Running Linux)
Windows/MS-DOS compatibility: 1.5.9. Interfacing with Windows and MS-DOS (Running Linux)
utilities taglib, AxKit: E.3.5. Utilities Taglib (Practical mod_perl)
utmp file: 8.3. Managing System Logs (Running Linux)
uudecode( ): A.6.11. String Functions (Apache: The Definitive Guide)
uudecode command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
uuencode command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
uuidgen command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
UUIDs (Universal Unique Identifiers), creating (uuidgen): 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
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