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Index: H
- h or H (hold) commands, sed editor: 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
- filesystem types and /etc/fstab: 44.5. Filesystem Types and /etc/fstab
- filesystems
- 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
- 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
- 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
- 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
- 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
- -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
- history number in shell prompts: 4.3. Dynamic 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
- 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
- shell command line-editing: 30.14. Shell Command-Line Editing
- history shell variable: 35.9. Shell Variables
- history substitution: 29.3. C-Shell Aliases with Command-Line Arguments
- HISTSIZE environment variable: 30.1. The Lessons of History
- HOBLink JWT RDP client: 47.9.3. Hob
- hold (h or H) commands, sed editor: 34.14. Hold Space: The Set-Aside Buffer
- HOLD SCREEN button: 5.6.1. Output Stopped?
- hold space (sed editor): 34.17. The Deliberate Scrivener
- home directory: 1.15. Your Home Directory
- $HOME environment variable: 3.7. Use Absolute Pathnames in Shell Setup Files
- $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
- showing with who am i command: 3.12. Terminal Setup: Testing Remote Hostname and X Display
- hosts
- 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
- htmllib and HTMLParser modules: 42.4. Python and the Web
- HTMLParser module: 42.7. htmllib and HTMLParser
- HTTP
- hung terminals, fixing: 5.6. Checklist: Terminal Hangs When I Log In
- HUP (hangup) signals: 24.10. What Are Signals?
- .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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