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Index: H

h or H (hold) commands, sed editor: 34.17. The Deliberate Scrivener
h command: 34.17. The Deliberate Scrivener
hacking: 1.2. Power Grows on You
handlers for DDoS attacks: 48.5. What We Mean by DoS
hangups (see HUP signals)
hangups, background processes and: 23.10. nohup
hard disk quota limits: 15.11. Disk Quotas
hard drives: 44.2. Reading Kernel Boot Output
hard links: 10.4. More About Links
10.6. Stale Symbolic Links
-i file in home directory for confirmation of file deletion: 14.8. Safer File Deletion in Some Directories
broken: 10.5. Creating and Removing Links
copying: 10.12. Copying Directory Trees with cp -r
disk space and: 15.4. Save Space with a Link
finding for files: 9.24. Finding the (Hard) Links to a File
symbolic links vs.: 10.4.1. Differences Between Hard and Symbolic Links
tar -l command, printing messages about: 15.7. Save Space: tar and compress a Directory Tree
to .enter and .exit files: 31.13. Automatic Setup When You Enter/Exit a Directory
hardware: 44.1. Quick Introduction to Hardware
dialup PPP sessions: 44.11. Setting Up a Dialup PPP Session
disk partitioning: 44.4. Disk Partitioning
PCs: 44.4. Disk Partitioning
filesystem types and /etc/fstab: 44.5. Filesystem Types and /etc/fstab
filesystems
mounting NFS and SMBFS: 44.9. Mounting Network Filesystems — NFS, SMBFS
kernel boot output for devices: 44.2. Reading Kernel Boot Output
kernel configuration to support: 44.3. Basic Kernel Configuration
modems: 44.10. Win Is a Modem Not a Modem?
network devices, configuring: 44.8. Network Devices — ifconfig
/proc filesystem files: 24.9.5. A Glimpse at Hardware
serial consoles: 44.14. Decapitating Your Machine — Serial Consoles
sound cards and other: 44.13. Dealing with Sound Cards and Other Annoying Hardware
supported hardware lists: 44.13. Dealing with Sound Cards and Other Annoying Hardware
USB configuration: 44.12. USB Configuration
hash codes: 16.4. Inside spell
hash command: 27.6. Controlling Shell Command Searches
hashes (Perl): 41.5. Perl Boot Camp, Part 2: Variables and Data Types
41.5.3. Hashes
functions for: 41.5.3. Hashes
iterating over: 41.5.3. Hashes
head command: 8.15. newer: Print the Name of the Newest File
12.12. Printing the Top of a File
37.9. Making an Arbitrary-Size File for Testing
43.12. What Can You Do with an Empty File?
c option to print characters/bytes: 12.12. Printing the Top of a File
GNU version, c nk and c nm options: 12.12. Printing the Top of a File
n option to control number of lines displayed: 12.12. Printing the Top of a File
head of a pathname (:h operator): 28.5. String Editing (Colon) Operators
headers, mail
creating with cat: 21.12.2. MIME Encoding
proper formation of: 21.12.2. MIME Encoding
removing with behead script: 21.5. Remove Mail/News Headers with behead
help: 2.1. The man Command
command versions: 2.6. Which Version Am I Using?
info commands: 2.9. The info Command
man command: 2.1. The man Command
searching online manual pages: 2.4. Searching Online Manual Pages
terminals, tty command: 2.7. What tty Am I On?
Unix system names: 2.5. How Unix Systems Remember Their Names
whatis command: 2.2. whatis: One-Line Command Summaries
whereis command: 2.3. whereis: Finding Where a Command Is Located
who command: 2.8. Who's On?
help command (lpc): 45.3. Printer Control with lpc
here documents: 27.16. Here Documents
28.13. Here Document Example #1: Unformatted Form Letters
hereis document terminators: 36.19. Quoted hereis Document Terminators: sh Versus csh
hgrep script: 13.16. A Highlighting grep
hidden files, listing with and ls -a and ls -A: 8.9. Showing Hidden Files with ls -A and -a
hierarchy, filesystem: 40.1. /usr/bin and Other Software Directories
highlighting: 8.6.1. Trying It
hgrep script, using: 13.16. A Highlighting grep
in shell prompts: 4.10. Highlighting and Color in Shell Prompts
histchars shell variable, changing history characters with: 30.15. Changing History Characters with histchars
histfile shell variable (tcsh): 3.3. Shell Setup Files — Which, Where, and Why
HISTFILESIZE environment variable: 30.12. Picking Up Where You Left Off
history command: 30.1. The Lessons of History
-d and -f options, showing dates and times: 30.7. History by Number
-D option, showing elapsed time: 30.7. History by Number
-h option: 30.13. Pass History to Another Shell
-r (reverse) option: 30.13. Pass History to Another Shell
bash shell, cautions about using: 30.7. History by Number
-w option: 30.13. Pass History to Another Shell
listing specified number of previous commands: 30.7. History by Number
.history file: 30.12. Picking Up Where You Left Off
tcsh shells: 3.3. Shell Setup Files — Which, Where, and Why
history number in shell prompts: 4.3. Dynamic Prompts
30.2. History in a Nutshell
30.7. History by Number
multiline C-shell prompt: 4.7. Multiline Shell Prompts
history of commands: 1.6. There Are Many Shells
30.1. The Lessons of History
!$ sequence for safety with wildcards: 30.6. Using !$ for Safety with Wildcards
changing history characters with histchars: 30.15. Changing History Characters with histchars
checking with :p operator: 30.11. Check Your History First with :p
history numbers: 30.7. History by Number
history substitution
!$ sequence: 30.3. My Favorite Is !$
mkdir command, using with: 7.8. Making Directories Made Easier
!:n* sequence: 30.4. My Favorite Is !:n*
history substitutions: 30.8. History Substitutions
narrowing searches with: 13.11. Narrowing a Search Quickly
passing to other shells: 30.13. Pass History to Another Shell
repeating commands with: 28.11. Repeating a Time-Varying Command
saving history in history file: 30.12. Picking Up Where You Left Off
bash, ksh, and zsh shells: 30.12.1. bash, ksh, zsh
C shells: 30.12.2. C Shells
shell command line-editing: 30.14. Shell Command-Line Editing
bash: 30.14.5. bash Editing
Emacs editing mode: 30.14.2. Emacs Editing Mode
ksh (Korn shell): 30.14.4. ksh Editing
tcsh shell: 30.14.3. tcsh Editing
vi editing mode: 30.14.1. vi Editing Mode
zsh: 30.14.6. zsh Editing
history shell variable: 35.9. Shell Variables
history substitution: 29.3. C-Shell Aliases with Command-Line Arguments
30.2. History in a Nutshell
30.8. History Substitutions
disabling in bash: 30.16. Instead of Changing History Characters
editing substitutions in C shells, zsh, and bash: 28.5. String Editing (Colon) Operators
for loop, using for: 28.9.1. A foreach Loop
HISTSIZE environment variable: 30.1. The Lessons of History
30.12. Picking Up Where You Left Off
HOBLink JWT RDP client: 47.9.3. Hob
hold (h or H) commands, sed editor: 34.14. Hold Space: The Set-Aside Buffer
34.17. The Deliberate Scrivener
h command: 34.17. The Deliberate Scrivener
HOLD SCREEN button: 5.6.1. Output Stopped?
hold space (sed editor): 34.17. The Deliberate Scrivener
transforming part of a line, use in: 34.15. Transforming Part of a Line
home directory: 1.15. Your Home Directory
bin subdirectory, creating: 7.4. A bin Directory for Your Programs and Scripts
finding: 7.2. Many Homes
31.11. Finding (Anyone's) Home Directory, Quickly
HOME environment variable: 35.5. Predefined Environment Variables
pathname of: 3.7. Use Absolute Pathnames in Shell Setup Files
$HOME environment variable: 3.7. Use Absolute Pathnames in Shell Setup Files
7.2. Many Homes
$HOME/.rhosts file: 6.10.2. Starting a Remote Client with rsh and ssh
host allow directive: 47.2. Installing and Configuring Samba
host-based access control: 6.10.2. Starting a Remote Client with rsh and ssh
host-based modems: 44.10. Win Is a Modem Not a Modem?
host tool: 46.9. Domain Name Service (DNS)
hostname command: 2.5. How Unix Systems Remember Their Names
hostnames
completion by shells: 28.6.3. Command-Specific Completion
for IP address, finding with dig -x: 46.3. Status and Troubleshooting
mapped to IP addresses by DNS: 46.9. Domain Name Service (DNS)
NETBIOS: 47.2. Installing and Configuring Samba
in shell prompts: 4.2. Static Prompts
multiline C-shell prompt: 4.7. Multiline Shell Prompts
showing with who am i command: 3.12. Terminal Setup: Testing Remote Hostname and X Display
hosts
.cshrc.$HOST file for per host setup: 3.18. A .cshrc.$HOST File for Per Host Setup
trusted-host authentication on SSH: 51.5. General and Authentication Problems
hosts.equiv file: 6.10.2. Starting a Remote Client with rsh and ssh
HTML: 45.13. Formatting Markup Languages — troff, LATEX, HTML, and So On
converted into PostScript: 45.16. Converting Typeset Files into a Printing Language
editing files with batch editing script: 20.7. ed/ex Batch Edits: A Typical Example
file extensions: 1.12. Filename Extensions
htmllib and HTMLParser modules: 42.4. Python and the Web
HTMLParser module: 42.7. htmllib and HTMLParser
HTTP
Emacs facility for: 19.2. Emacs Features: A Laundry List
URI protocol types: 40.6.1. Configuring the sources.list File
hung terminals, fixing: 5.6. Checklist: Terminal Hangs When I Log In
aborting programs: 5.6.5. Aborting Programs
output stopped by HOLD SCREEN or SCROLL LOCK button: 5.6.1. Output Stopped?
program waiting for input: 5.6.3. Program Waiting for Input?
stalled data connection: 5.6.4. Stalled Data Connection?
stopped jobs, checking for: 5.6.2. Job Stopped?
HUP (hangup) signals: 24.10. What Are Signals?
24.13. Printer Queue Watcher: A Restartable Daemon Shell Script
ignoring with nohup command: 23.10. nohup
.hushlogin file: 3.1. What Happens When You Log In
hyphen , under symbols) (see - (dash)
HZ constant, frequency of system time updates: 37.6. How Unix Keeps Time


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