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# Index: H

<h#> HTML tags: 16.1.4.1. HTML basics (Running Linux)
\h command: 17.1. MySQL Utilities (MySQL & mSQL)
H command (sed): 12.5. Alphabetical Summary of sed Commands (Linux in a Nutshell)
-h flag (httpd/apache): 2.2. Apache's Flags (Apache: The Definitive Guide)
$h->err( ): 4.5.2. Error Diagnostics (Programming the Perl DBI)
  A.4. Methods Common to All Handles (Programming the Perl DBI)
$h->errstr( ): 4.5.2. Error Diagnostics (Programming the Perl DBI)
  A.4. Methods Common to All Handles (Programming the Perl DBI)
$h->func( ): A.4. Methods Common to All Handles (Programming the Perl DBI)
$h->state( ): 4.5.2. Error Diagnostics (Programming the Perl DBI)
  7.3.2. Standard Error Codes (Programming the Perl DBI)
  A.4. Methods Common to All Handles (Programming the Perl DBI)
$h->trace( ): A.4. Methods Common to All Handles (Programming the Perl DBI)
$h->trace_msg( ): A.4. Methods Common to All Handles (Programming the Perl DBI)
hacking support: 7.4.2. Building the Kernel (Running Linux)
halt command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
handler_rec structure: 15.3.17. Handlers (Apache: The Definitive Guide)
handlers: 15.1. Overview (Apache: The Definitive Guide)
  15.3.17. Handlers (Apache: The Definitive Guide)
  Apache/Perl, not implementing: 17.3.1. Installation and Configuration (CGI Programming with Perl)
  response handlers: 17.3. mod_perl (CGI Programming with Perl)
handlers, Apache: 4.8. Handlers (Apache: The Definitive Guide)
handles: 10.4.2.2. Address book CGI script (CGI Programming with Perl)
  4.2. Handles (Programming the Perl DBI)
  attributes: 6.1. Handle Attributes and Metadata (Programming the Perl DBI)
  child and parent: 6.1. Handle Attributes and Metadata (Programming the Perl DBI)
  database (see database handles)
  driver: 4.2.1. Driver Handles (Programming the Perl DBI)
  encapsulating a connection to a database: 4.2.2. Database Handles (Programming the Perl DBI)
  encapsulating SQL statements for execution in a database: 4.2.3. Statement Handles (Programming the Perl DBI)
  statement (see statement handles)
handshake protocol (SSL): D.1. Handshake Protocol (Apache: The Definitive Guide)
  attacks and: D.1.2. Version Rollback Attacks (Apache: The Definitive Guide)
handshaking (PPP): 15.2.1.3. Setting up PPP (Running Linux)
hard disk (client user), storing cookies on: 11.3.1. Setting Cookies (CGI Programming with Perl)
hard drives: 2.2.2. Repartitioning Concepts (Running Linux)
  (see also disk space)
  booting Linux from: 3.3.4.2. Problems booting Linux from the hard drive (Running Linux)
    5.2.2. Using LILO (Running Linux)
  controller requirements: 1.9.3. Hard Drive Controller Requirements (Running Linux)
  "Drive not bootable" error: 3.3.4.2. Problems booting Linux from the hard drive (Running Linux)
  errors: 3.3.3. Problems Installing the Software (Running Linux)
  geometry of: 3.3.2.2. Problems recognizing hard drive or controller (Running Linux)
    3.3.3. Problems Installing the Software (Running Linux)
    5.2.2.3. Specifying boot time options (Running Linux)
  Linux requirements: 1.9.4. Hard Drive Space Requirements (Running Linux)
  partitions: 2.2.2. Repartitioning Concepts (Running Linux)
    Linux requirements: 2.2.3. Linux Partition Requirements (Running Linux)
    LinuxPPC: D.3.2. Partitioning the Hard Disk (Running Linux)
    repartitioning: 2.2.4. Repartitioning Your Drives (Running Linux)
hard_timeout( ): 14.6.16. Timeout and Alarm Functions (Apache: The Definitive Guide)
hardware
  Alpha systems: C.6.2. Preparing Hardware for Installation (Running Linux)
    requirements: C.5.1. Minimum Hardware (Running Linux)
    resources on: C.4. Collecting System Hardware Information (Running Linux)
  booting Linux/m86k: E.4.1. Booting Linux (Running Linux)
  building kernel and: 7.4.2. Building the Kernel (Running Linux)
  detection parameters: 3.1.1. Booting Linux (Running Linux)
  drive controllers: 1.9.3. Hard Drive Controller Requirements (Running Linux)
  fax devices: 8.4.4. Checking Print Utilities (Running Linux)
  hardware groups: 5.7.4. The Group File (Running Linux)
  incompatibility: 3.3.1. Problems with Booting the Installation Media (Running Linux)
  ISDN, configuring: 15.3.1. Configuring Your ISDN Hardware (Running Linux)
  Linux PPC concerns: D.6. Getting Hardware to Do What You Want It to Do (Running Linux)
  Linux requirements: 1.9. Hardware Requirements (Running Linux)
  Linux/m86k: E.2. Supported Hardware (Running Linux)
  LinuxPPC: D.1. Compatible Hardware (Running Linux)
  mice: 1.9.6.1. Mice and other pointing devices (Running Linux)
  modems: 1.9.6.5. Modems (Running Linux)
  monitors and video adapters: 1.9.5. Monitor and Video Adapter Requirements (Running Linux)
  printers: 1.9.6.4. Printers (Running Linux)
    8.4.1. Checking Printer Hardware (Running Linux)
    8.4.13. Printer Optimization (Running Linux)
  Sun SPARC systems: F.1. Supported Hardware (Running Linux)
  tape drives: 8.1.1.1. Backing up to tape (Running Linux)
  troubleshooting: 3.3.2. Hardware Problems (Running Linux)
  undetected during book: 5.2.2.3. Specifying boot time options (Running Linux)
  X Window System requirements: 10.2. Hardware Requirements (Running Linux)
hardware, commands for: 2.1.3. Hardware (Linux in a Nutshell)
hash mark (#)

3.2.3. Editing /etc/fstab (Running Linux)
13.2.2. Some Syntax Rules (Running Linux)
as root prompt: 5.1. Running the System (Running Linux)
for comments: 1.8.2. Semimanual Method (Apache: The Definitive Guide)
  1.8.4. Configuration Settings and Rules (Apache: The Definitive Guide)

for deprecated methods: 22. JDBC Reference (MySQL & mSQL)

bash: 7.7. Built-in Commands (Linux in a Nutshell)

hash references
  fetchall_arrayref( ) and: 5.6.2.3. Slice hash reference argument (Programming the Perl DBI)
  retrieved from databases: 5.1.3. Fetching Data (Programming the Perl DBI)
hash tables
  DBM files and: 10.2. DBM Files (CGI Programming with Perl)
  tying to DBM file: 10.2. DBM Files (CGI Programming with Perl)
  untying from database files: 10.2.1. DB_File (CGI Programming with Perl)
hash values: 2.7.1. Creating a New Database (Programming the Perl DBI)
hash variables: 2.7. DBM Files and the BerkeleyDatabase Manager (Programming the Perl DBI)
#! command
  bash shell command: 7.7. Built-in Commands (Linux in a Nutshell)
  csh/tcsh command: 8.9. Built-in csh and tcsh Commands (Linux in a Nutshell)
hashes
  command-line options, storing in: 12.3. Inverted Index Search (CGI Programming with Perl)
  of data or hash reference, subroutines returning: 4.3. Decoding Form Input (CGI Programming with Perl)
  elements, interpreting as attributes for HTML elements: 5.3.3. Standard HTML Elements (CGI Programming with Perl)
  hash algorithms, using to generate digests: 8.3. Encryption (CGI Programming with Perl)
  HTML::Template and: 6.3.1.1. Loops (CGI Programming with Perl)
  index file, binding to: 12.3. Inverted Index Search (CGI Programming with Perl)
  JavaScript, references to: 5.3.2.1. start_html (CGI Programming with Perl)
  meta tags, reference to: 5.3.2.1. start_html (CGI Programming with Perl)
  read/write basis for accessing: 10.2.1. DB_File (CGI Programming with Perl)
hashstat command (csh/tcsh): 8.9. Built-in csh and tcsh Commands (Linux in a Nutshell)
hashtables
  DBM files, querying limitations: 2.7.3.4. Querying limitations of DBM files and hashtables (Programming the Perl DBI)
  traversing chained records: 2.7.3.5. Chaining multiple values into a hash (Programming the Perl DBI)
HAVING clause: 15.1. MySQL SQL (MySQL & mSQL)
hd= parameter (linux): 3.1.1. Booting Linux (Running Linux)
  3.3.3. Problems Installing the Software (Running Linux)
hda# files: 3.1.2. Drives and Partitions Under Linux (Running Linux)
head command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
HEAD method (HTTP): 4.1.2. What Is an HTTP Method? (Apache: The Definitive Guide)
HEAD requests: 2.3.1.3. HEAD (CGI Programming with Perl)
header( ) function: 18.1. PHP (MySQL & mSQL)
  18.1. PHP (MySQL & mSQL)
$Header keyword (RCS): 14.8.1.1. Keywords (Linux in a Nutshell)
header method
  disabling caching with: 11.3.2. Testing for Cookies (CGI Programming with Perl)
  locating: 5.1.3. Standard and Object-Oriented Syntax (CGI Programming with Perl)
header, Texinfo: 9.3.3.1. Writing the Texinfo source (Running Linux)
HeaderName directive: 3.10.1. HeaderName (Apache: The Definitive Guide)
  7.1.12. HeaderName (Apache: The Definitive Guide)
headers: 3.3.1.3. Specifying status codes (CGI Programming with Perl)
  (see also status headers)
  CGI: 4.2. Writing and Executing Scripts (Apache: The Definitive Guide)
  CGI programs
    generating partial headers: 3.3.1. Partial Headers (CGI Programming with Perl)
    requesting no caching: 3.4.3. Restricting Image Hijacking (CGI Programming with Perl)
  email
    adding extra to: 9.4.1. Command-Line Options (CGI Programming with Perl)
    fields: 9.3. Structure of Internet Email (CGI Programming with Perl)
  environment variables for: 3.2.1. CGI Environment Variables (CGI Programming with Perl)
  HTML, CGI application errors and: 15.1.4. "Malformed" Header (CGI Programming with Perl)
  HTML tables, rows consisting of ... cells: 6.4.3.1. Tables (CGI Programming with Perl)
  HTTP: 2.2.1. The Request and Response Cycle (CGI Programming with Perl)
    2.2.2. HTTP Headers (CGI Programming with Perl)
    2.4. Server Responses (CGI Programming with Perl)
    CGI scripts, declaring type of document output: 1.2.1. Sample CGI (CGI Programming with Perl)
    Cookie header: 11.3.1. Setting Cookies (CGI Programming with Perl)
    cookie header lines: 11. Maintaining State (CGI Programming with Perl)
    CRLF requirement: 3.3.1.1. Outputting documents (CGI Programming with Perl)
    environment variables, information on server and client: 3.2. Environment Variables (CGI Programming with Perl)
    error handling and: 5.5.3. Error Subroutines (CGI Programming with Perl)
    extensions: 2.3.2.8. Cookies (CGI Programming with Perl)
    fields: 2.2.2. HTTP Headers (CGI Programming with Perl)
      2.3.2. Request Header Field Lines (CGI Programming with Perl)
    formatting information in: 1.2. Introduction to CGI (CGI Programming with Perl)
    generating with CGI.pm module: 5.3. Generating Output with CGI.pm (CGI Programming with Perl)
    header and redirect methods, returning with: 5.3.1. Controlling HTTP Headers with CGI.pm (CGI Programming with Perl)
    media types, listing preferred: 2.6.1. Media Type (CGI Programming with Perl)
    request line: 2.3.1. The Request Line (CGI Programming with Perl)
    responses: 2.4.2. Server Headers (CGI Programming with Perl)
    separating from message body: 3.3.1.1. Outputting documents (CGI Programming with Perl)
    Set-Cookie: 11.3.1. Setting Cookies (CGI Programming with Perl)
  HTTP response: 3.10. HTTP Response Headers (Apache: The Definitive Guide)
  information in, web server response: 1.2. Introduction to CGI (CGI Programming with Perl)
  Internet email messages: 9.3. Structure of Internet Email (CGI Programming with Perl)
  malformed, CGI script errors: 15.1.4. "Malformed" Header (CGI Programming with Perl)
  parsing: 15.3.11. Header Parser (Apache: The Definitive Guide)
headings, HTML: 16.1.4.1. HTML basics (Running Linux)
heads= option (LILO): G.1. Global Options (Running Linux)
Helix GNOME Desktop: 15.4.8. Sawfish Window Manager Configuration (Linux in a Nutshell)
help: A. Support Organizations (Apache: The Definitive Guide)
  0.1. Why People Like Linux (Running Linux)
  1.11. Getting Help (Running Linux)
  Emacs: 9.2.3. Tutorial and Online Help (Running Linux)
  lpc: 8.4.12. Controlling Printer Services with lpc (Running Linux)
  online help: 3.2.2. Getting Online Help (Running Linux)
help command: 17.1. MySQL Utilities (MySQL & mSQL)
help command (CVS): 14.4.7.9. help (Linux in a Nutshell)
help command (ex): 11.13. Alphabetical Summary of ex Commands (Linux in a Nutshell)
help, Emacs commands for: 10.3.16. Detail Information Help Commands (Linux in a Nutshell)
  10.3.16. Detail Information Help Commands (Linux in a Nutshell)
  (see also documentation)
help flag (apachect1): 2.4. Setting Up a Unix Server (Apache: The Definitive Guide)
help, online: 0.1.4. Online Linux Support (Linux in a Nutshell)
here documents: 5.4.2. Here Documents (CGI Programming with Perl)
  print statements: 1.2.1. Sample CGI (CGI Programming with Perl)
HEX( ) function: 15.1. MySQL SQL (MySQL & mSQL)
hexadecimal numbers
  digests: 8.3.1. MD5 (CGI Programming with Perl)
  HTTP characters, replacing: 4.1. Sending Data to the Server (CGI Programming with Perl)
  URL character encoding: 2.1.3. URL Encoding (CGI Programming with Perl)
  URL-encoded characters, decoding: 4.3. Decoding Form Input (CGI Programming with Perl)
hexdec( ) function: 18.1. PHP (MySQL & mSQL)
  18.1. PHP (MySQL & mSQL)
hidden fields: 4.2.3.3. Hidden fields (CGI Programming with Perl)
  data, security risks in trusting: 8.2.5. Trusting the Browser (CGI Programming with Perl)
  feedback forms, email addresses in: 9.1.2. False Identities (CGI Programming with Perl)
  NAME and VALUE attributes in: 4.2.3.3. Hidden fields (CGI Programming with Perl)
  session information, storing in: 11.2. Hidden Fields (CGI Programming with Perl)
  tainted data in email addresses: 9.1.2. False Identities (CGI Programming with Perl)
  unique identifiers, storing in: 11. Maintaining State (CGI Programming with Perl)
hidden files: 4.4.2. Listing Files (Running Linux)
hidden form elements: 16.1.5.1. The HTML form document (Running Linux)
High Sierra Filesystem: 6.1.1. Filesystem Types (Running Linux)
hi/his commands (CVS) (see history command (CVS))
HiSax driver: 15.3.1. Configuring Your ISDN Hardware (Running Linux)
histdup variable (csh/tcsh): 8.4.3. Predefined Shell Variables (Linux in a Nutshell)
histfile variable (csh/tcsh): 8.4.3. Predefined Shell Variables (Linux in a Nutshell)
histlit variable (csh/tcsh): 8.4.3. Predefined Shell Variables (Linux in a Nutshell)
history, command: 4.7.2. Moving Around Among Commands (Running Linux)
  bash shell: 7.3.3. Command-line Editing (Linux in a Nutshell)
    7.3.3. Command-line Editing (Linux in a Nutshell)
    7.4.2. Built-in Shell Variables (Linux in a Nutshell)
  csh and tcsh: 8.6. Command History (Linux in a Nutshell)
  fc command: 7.7. Built-in Commands (Linux in a Nutshell)
history command (csh/tcsh): 8.9. Built-in csh and tcsh Commands (Linux in a Nutshell)
history command (CVS): 14.4.7.10. history (Linux in a Nutshell)
  record types: 14.4.7.10. history (Linux in a Nutshell)
/history dbish command: 8.1.2. Handling Statements (Programming the Perl DBI)
history file (CVS): 14.3.3.7. The history file (Linux in a Nutshell)
history of Apache: 0.1. Who Wrote Apache, and Why? (Apache: The Definitive Guide)
history of Linux: 1. Introduction (Linux in a Nutshell)
  0. Preface (Running Linux)
  1.2. A Brief History of Linux (Running Linux)
history variable (csh/tcsh): 8.4.3. Predefined Shell Variables (Linux in a Nutshell)
hit counter (see access counters)
HLT instruction: 3.1.1. Booting Linux (Running Linux)
/home directory: 4.4.1. Directories (Running Linux)
  8.1.1. Simple Backups (Running Linux)
$HOME environment variable (CVS): 14.4.2. Configuring CVS (Linux in a Nutshell)
home page, DBI: A.1.1. Getting Help (Programming the Perl DBI)
home pages for projects: A.5. Project Home Pages (CGI Programming with Perl)
$HOMEDRIVE environment variable (CVS): 14.4.2. Configuring CVS (Linux in a Nutshell)
$HOMEPATH environment variable (CVS): 14.4.2. Configuring CVS (Linux in a Nutshell)
horizontal rule in HTML: 16.1.4.6. More HTML features (Running Linux)
host address: 15.1.1. TCP/IP Concepts (Running Linux)
host command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
Host field: 2.3.2.1. Host (CGI Programming with Perl)
host function: 21.3. Msql.pm API (MySQL & mSQL)
host machine: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
Host, MySQL server status: 4.4.1.4. Server status (MySQL & mSQL)
host table: 4.4.3.3. The host table (MySQL & mSQL)
hostid command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
Host_Lookup system variable: 16.2.2.2. system (MySQL & mSQL)
Hostname: 5.5.1.4. Server status (MySQL & mSQL)
hostname command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  15.1.3.7. Setting your hostname (Running Linux)
HostNameLookups directive: 3.4.17. HostNameLookups (Apache: The Definitive Guide)
hostnames: 16.2.4.1. Preparing for installation (Running Linux)
  "cannot determine local hostname": 2.4.2. Running Apache Under Unix (Apache: The Definitive Guide)
  controlling access: 5.6. Order, Allow, and Deny (Apache: The Definitive Guide)
  mapping several to one address: 3.4.7. ServerPath (Apache: The Definitive Guide)
  providing (see ServerName directory)
  reverse-DNS lookup: 3.4.17. HostNameLookups (Apache: The Definitive Guide)
  setting: 15.1.3.7. Setting your hostname (Running Linux)
  SMB protocol: 12.1.2. Using Samba to Mount Directories from Windows Systems on Your Network (Running Linux)
hosts: 1. Getting Started (Apache: The Definitive Guide)
  2.1.1. Elements of a URL (CGI Programming with Perl)
  accessing remote (see telnet)
  administration commands for: 2.1.4. Host Information (Linux in a Nutshell)
  command execution on remote: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  in email addresses: 9.2.1. Validating Syntax (CGI Programming with Perl)
  getting information on: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
    3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
    3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
    3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  host numbers: 1.2. What to Know About TCP/IP (Apache: The Definitive Guide)
  hostnames: 1.3.1. Multiple Sites: Unix (Apache: The Definitive Guide)
  including name in absolute URLs: 2.1.2. Absolute and Relative URLs (CGI Programming with Perl)
  listing users logged on to: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  logging in remotely: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
    3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  maintaining files over multiple: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  nonrouting (bastion): 13.4.2. Separate Networks (Apache: The Definitive Guide)
  ommitting in URLs: 2.1.2. Absolute and Relative URLs (CGI Programming with Perl)
  pinging: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  sending message to users on: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  tracing packet routes to: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
  virtual (see virtual hosts)
hosts file: 2.4.6. Our Experimental Micro Web (Apache: The Definitive Guide)
  15.1.3.3. /etc/hosts (Running Linux)
hosts.conf file: 15.1.3.5. /etc/host.conf (Running Linux)
hotspots (see imagemaps)
HOUR( ) function: 15.1. MySQL SQL (MySQL & mSQL)
HOWTO documents, Linux: A.1. Online Documents (Running Linux)
  1.10.1. Online Documents (Running Linux)
HPFS filesystem: 6.1.1. Filesystem Types (Running Linux)
<hr> HTML tag: 16.1.4.6. More HTML features (Running Linux)
hsfs filesystem: 6.1.1. Filesystem Types (Running Linux)
.htaccess file: 3.13. .htaccess (Apache: The Definitive Guide)
  5.11. Using .htaccess Files (Apache: The Definitive Guide)
  7.2.1. DirectoryIndex (Apache: The Definitive Guide)
htdigest utility: 5.7. Digest Authentication (Apache: The Definitive Guide)
htdocs directory: 1.1. How Does Apache Work? (Apache: The Definitive Guide)
  2.1. What Is a Web Site? (Apache: The Definitive Guide)
HTML
  definition: 9.1. What Is CGI? (MySQL & mSQL)
  extensions: 12. PHP and Other Support for Database-driven HTML (MySQL & mSQL)
  forms: 9.2. HTML Forms (MySQL & mSQL)
    12.2.3. W3-mSQL Example (MySQL & mSQL)
  Lite and: 12.2.3. W3-mSQL Example (MySQL & mSQL)
  W3-mSQL and: 12.2. W3-mSQL (MySQL & mSQL)
HTML (Hypertext Markup Language
  forms (see forms)
HTML pages
  headers and footers, maintaining across pages: 11.2. Hidden Fields (CGI Programming with Perl)
  link for JPEG or PNG images: 3.4.1. Check the Client Browser (CGI Programming with Perl)
  LWP module and: 14.2. An Introduction to XML (CGI Programming with Perl)
  static, forwarding user to: 3.3.1.2. Forwarding to another URL (CGI Programming with Perl)
  viewing Perl source code in: 15.3.4. Dumping Variables (CGI Programming with Perl)
HTML tags: 5.2.2.3. Index queries (CGI Programming with Perl)
  9.2. HTML Forms (MySQL & mSQL)
  12.1. Alternatives for Dynamic Content on the Web (MySQL & mSQL)
  to hide scripting language: 12.2. W3-mSQL (MySQL & mSQL)
  4.2.2. The <FORM> Tag (CGI Programming with Perl)
    Embperl module and: 6.4.2. Syntax (CGI Programming with Perl)
    formatting HTML::Template commands as: 6.3.1. Syntax (CGI Programming with Perl)
    forms: 4.2. Form Tags (CGI Programming with Perl)
    onChange handler, adding to: 7.2.1.1. Validating elements (CGI Programming with Perl)
    rules for basic: 5.3.3. Standard HTML Elements (CGI Programming with Perl)
    stripping from index material: 12.3. Inverted Index Search (CGI Programming with Perl)
    tag: 5.3.2.2. end_html (CGI Programming with Perl)
HTML templates: 6. HTML Templates (CGI Programming with Perl)
  env.tmpl file: 6.3.1.1. Loops (CGI Programming with Perl)
  global variables, defining with Embperl: 6.4.4. Global Variables (CGI Programming with Perl)
  reasons for using: 6.1. Reasons for Using Templates (CGI Programming with Perl)
HTML::Embperl module: 6.4. Embperl (CGI Programming with Perl)
  configuration: 6.4.1. Configuration (CGI Programming with Perl)
  example: 6.4.5. Example (CGI Programming with Perl)
  Execute function: 6.4.1.1. Execute (CGI Programming with Perl)
  global variables, defining for templates: 6.4.4. Global Variables (CGI Programming with Perl)
  meta-commands: 6.4.2.3. Meta-commands (CGI Programming with Perl)
  tables, automatic construction of: 6.4.3. HTML Logic (CGI Programming with Perl)
  website: 6.4.6. Summary (CGI Programming with Perl)
HTML::Mason module: 6.5. Mason (CGI Programming with Perl)
  component approach: 6.5.1. A Component Approach (CGI Programming with Perl)
HTML::Parser module: 11.1. Query Strings and Extra Path Information (CGI Programming with Perl)
htmlspecialchars( ) function: 18.1. PHP (MySQL & mSQL)
  18.1. PHP (MySQL & mSQL)
HTML::Template module: 6.3. HTML::Template (CGI Programming with Perl)
  commands: 6.3.1. Syntax (CGI Programming with Perl)
    summary of: 6.3.1. Syntax (CGI Programming with Perl)
  conditionals, creating: 6.3.1.2. Conditionals (CGI Programming with Perl)
  CPAN information on: 6.3.2. Summary (CGI Programming with Perl)
  loops, creating: 6.3.1.1. Loops (CGI Programming with Perl)
  Mason module component approach vs.: 6.5.1. A Component Approach (CGI Programming with Perl)
  param method: 6.3.1. Syntax (CGI Programming with Perl)
htools package: 1.5.9. Interfacing with Windows and MS-DOS (Running Linux)
htpasswd utility: 5.3. Passwords Under Unix (Apache: The Definitive Guide)
  2.3.2.4. Authorization (CGI Programming with Perl)
ht_time( ): 14.6.10. Time and Date Functions (Apache: The Definitive Guide)
HTTP
  cookies: 9.4.1. State Retention (MySQL & mSQL)
  definition: 9.1. What Is CGI? (MySQL & mSQL)
  headers: 9.3.6. Standard Output (MySQL & mSQL)
HTTP-Accept header
  Accept method, evaluating content type for: 5.2.1.1. Accept (CGI Programming with Perl)
HTTP GET method: 9.3. The CGI Specification (MySQL & mSQL)
HTTP (Hypertext Transfer Protocol): 1. Getting Started (Apache: The Definitive Guide)
  4.1.1. What Is HTTP? (Apache: The Definitive Guide)
  2. The Hypertext Transport Protocol (CGI Programming with Perl)
  authorization: 2.3.2.4. Authorization (CGI Programming with Perl)
  content negotiation: 2.6. Content Negotiation (CGI Programming with Perl)
  content type headers, malformed: 15.1.4. "Malformed" Header (CGI Programming with Perl)
  file uploads, handling with: 5.2.4. File Uploads with CGI.pm (CGI Programming with Perl)
  header/body message structure: 2.2.1. The Request and Response Cycle (CGI Programming with Perl)
  headers: 2.2.2. HTTP Headers (CGI Programming with Perl)
    2.2.2. HTTP Headers (CGI Programming with Perl)
    (see also headers)
    generating with header method: 5.3.1.6. Other headers (CGI Programming with Perl)
    request line: 2.3.1. The Request Line (CGI Programming with Perl)
  HTTP Media Types specification: A.4. Other Specifications (CGI Programming with Perl)
  messages, Internet email messages vs.: 9.3. Structure of Internet Email (CGI Programming with Perl)
  methods: 1. Getting Started (Apache: The Definitive Guide)
    4.1.2. What Is an HTTP Method? (Apache: The Definitive Guide)
    5.2.5. Limit (Apache: The Definitive Guide)
  requests
    generating by submitting forms: 4.2.2. The <FORM> Tag (CGI Programming with Perl)
    global variables, undefining in Embperl: 6.4.2.2. Variable scope (CGI Programming with Perl)
  requests and responses: 2.2.1. The Request and Response Cycle (CGI Programming with Perl)
  response headers: 3.10. HTTP Response Headers (Apache: The Definitive Guide)
  server generation of: 3.3. CGI Output (CGI Programming with Perl)

responses: 2.4. Server Responses (CGI Programming with Perl)
server responses
  proxies, using for: 2.5. Proxies (CGI Programming with Perl)
statelessness of: 11. Maintaining State (CGI Programming with Perl)
status codes: 11.5.5. site.authent--Another Example (Apache: The Definitive Guide)
  15.2. Status Codes (Apache: The Definitive Guide)
status codes for errors: 5.2.4. File Uploads with CGI.pm (CGI Programming with Perl)
transaction model: 11. Maintaining State (CGI Programming with Perl)
URL characters, encoding: 4.1. Sending Data to the Server (CGI Programming with Perl)
URLs: 2.1. URLs (CGI Programming with Perl)
using Version 1.0: 4.6.5.2. force-response-1.0 (Apache: The Definitive Guide)
Version 1.1 and browsers: 6.5. Browsers and HTTP/1.1 (Apache: The Definitive Guide)
versions, 1.1 and 1.0: 2.2.3. HTTP 1.1 and HTTP 1.0 (CGI Programming with Perl)
WWW Consortium website for: 2. The Hypertext Transport Protocol (CGI Programming with Perl)
XML data, ease of transporting: 14.2. An Introduction to XML (CGI Programming with Perl)
HTTP_ mechanism: 9.3.1. Environment Variables (MySQL & mSQL)
http method (CGI.pm), returning HTTP_environment variables with: 5.2.1.2. http (CGI Programming with Perl)
HTTP POST method: 9.3. The CGI Specification (MySQL & mSQL)
HTTP requests
  creating and sending from within Perl with LWP module: 8.2.5. Trusting the Browser (CGI Programming with Perl)
  static HTML page, handling with CGI script
    unique identifiers: 11.1. Query Strings and Extra Path Information (CGI Programming with Perl)
HTTP_ACCEPT variable: 6.2.1. Image Negotiation (Apache: The Definitive Guide)
HTTP_ACCEPT_LANGUAGE variable: 6.3.1. LanguagePriority (Apache: The Definitive Guide)
HTTP_COOKIE environment variable: 11.3.1. Setting Cookies (CGI Programming with Perl)
httpd: 1.1. How Does Apache Work? (Apache: The Definitive Guide)
  16.1.3. Configuring Your Own WWW Server (Running Linux)
  1.8.7. Installing Apache Under Unix (Apache: The Definitive Guide)
  flags: 2.2. Apache's Flags (Apache: The Definitive Guide)
  restarting: 3.12. Restarts (Apache: The Definitive Guide)
  virtual (see virtual hosts)
httpd.conf: 16.1.3.1. httpd.conf (Running Linux)

2.4.1. Webuser and Webgroup (Apache: The Definitive Guide)
DirectoryIndex and AddType directives: 6.2.1. Configuration (CGI Programming with Perl)

HTTP_HOST environment variable: 5.2.1.7. virtual_host (CGI Programming with Perl)
HTTP_REFERER variable: 8.2.5. Trusting the Browser (CGI Programming with Perl)
  11.3.2. Testing for Cookies (CGI Programming with Perl)
https: 2.1.1. Elements of a URL (CGI Programming with Perl)
  connections using SSL or TLS: 8.3. Encryption (CGI Programming with Perl)
  HTTPS environment variables: 3.2.1. CGI Environment Variables (CGI Programming with Perl)
    5.2.1.3. https (CGI Programming with Perl)
Hughes, David: 1.4.1.1. David Hughes (MySQL & mSQL)
  5.1. Design (MySQL & mSQL)
  5.6.2.4. Programming interfaces (MySQL & mSQL)
Hughes Technology: 3.2. mSQL (MySQL & mSQL)
hung system: 3.3.1. Problems with Booting the Installation Media (Running Linux)
hup command (tcsh): 8.9. Built-in csh and tcsh Commands (Linux in a Nutshell)
HURD project: 1.8.4. Other Implementations of Unix (Running Linux)
hwclock command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
Hyalog utility: 4.5.2.5. Miscellaneous (MySQL & mSQL)
hyperlinks (see links, Web)
Hypertext Transfer Protocol (see HTTP)
- (hyphen): 13.2.5. Multiple Commands (Running Linux)
  Unix command options: 4.4.2. Listing Files (Running Linux)
hyphen (-): 13.2.5. Multiple Commands (Running Linux)
  Unix command options: 4.4.2. Listing Files (Running Linux)
hyphen (-) pattern-matching metacharacter: 9.3. Metacharacters (Linux in a Nutshell)
hyphens (-), attribute names: 5.3.3. Standard HTML Elements (CGI Programming with Perl)

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