Symbols & Numbers | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Index: D

d (matching numbers) in Perl regular expressions: 41.7. Perl Boot Camp, Part 4: Pattern Matching

d or D (delete) command, sed editor: 34.19. Multiline Delete

d or D (delete) commands, sed editor: 34.17. The Deliberate Scrivener

daemons: 1.10. The Kernel and Daemons

controlling terminal and: 24.6. The Controlling Terminal

cron daemon: 25.2.1. Execution Scheduling

DHCP: 46.10. Dynamic Host Configuration Protocol (DHCP)

inetd, disabling for security: 48.10. Disabling inetd

lpd: 45.8. Printing Over a Network

filters: 45.17. Converting Source Files Automagically Within the Spooler

nmbd: 47.2. Installing and Configuring Samba

printer: 45.3. Printer Control with lpc

removable media on Linux: 44.6. Mounting and Unmounting Removable Filesystems

restarting with the kill command: 24.13. Printer Queue Watcher: A Restartable Daemon Shell Script

Samba, restarting to share printers: 47.5. Printing with Samba

SMB: 47.2. Installing and Configuring Samba

SMB, running: 47.2. Installing and Configuring Samba

sshd

.pam file: 51.5. General and Authentication Problems

problems with: 51.7. Server and Client Problems

sshd, disabling printing and mail checking for: 51.5. General and Authentication Problems

tcpd: 48.12. TCP Wrappers

vold, for removable media: 44.6. Mounting and Unmounting Removable Filesystems

Darwin: 1.1. What's Special About Unix?

1.3. The Core of Unix

adding users to system: 49.2. When Does a User Become a User

enabling root access in: 49.12. Enabling Root in Darwin

data types, Python: 42.3.3. Everything's an Object

data types (Perl): 41.5. Perl Boot Camp, Part 2: Variables and Data Types

hashes: 41.5.3. Hashes

lists: 41.5.2. Arrays

references: 41.5.4. References

scalars: 41.5.1. Scalars

databases

distributed, updating: 11.11. Even More Uses for make

find command: 9.20. Finding Files (Much) Faster with a find Database

date and time, Bourne shell prompts, putting in: 4.15. External Commands Send Signals to Set Variables

date and time, including in shell prompt: 4.3. Dynamic Prompts

date command: 4.15. External Commands Send Signals to Set Variables

+ option: 8.17. Picking a Unique Filename Automatically

current date in dynamic shell prompt: 4.4. Simulating Dynamic Prompts

dater script: 43.11. Named Pipes: FIFOs

dd command

creating file for debugging purposes: 37.9. Making an Arbitrary-Size File for Testing

restoring files from remote tape drives: 38.7. Using tar to a Remote Tape Drive

restoring files remotely: 38.6.2. Remote Restoring

dd utility: 21.6. Low-Level File Butchery with dd

21.13. Text Conversion with dd

splitting files with: 21.9. Splitting Files at Fixed Points: split

DDoS (distributed denial-of-service attack): 48.5. What We Mean by DoS

dead links, listing: 8.16. oldlinks: Find Unconnected Symbolic Links

dead processes (see zombies)

Debian dselect tool (see dselect tool)

Debian Linux (see Linux)

debugging

Bourne shell scripts: 35.13. Test Exit Status with the if Statement

37.1. Tips for Debugging Shell Scripts

copying your work with script program: 37.7. Copy What You Do with script

line numbers reset in redirected loops: 37.1.5. Line Numbers Reset Inside Redirected Loops

making a file for testing: 37.9. Making an Arbitrary-Size File for Testing

numeric tests, errors in: 37.3. Stop Syntax Errors in Numeric Tests

output, piping to pager: 37.1.1. Use -xv

quoting command line arguments: 37.5. Quoting and Command-Line Parameters

saving output in file and displaying on screen: 37.1.1. Use -xv

shell variable: 37.2. Bourne Shell Debugger Shows a Shell Variable

shell variables: 37.2. Bourne Shell Debugger Shows a Shell Variable

string test syntax errors: 37.4. Stop Syntax Errors in String Tests

time keeping on Unix systems: 37.6. How Unix Keeps Time

unmatched code or fi unexpected errors: 37.1.4. Missing or Extra esac, ;;, fi, etc.

unmatched operators: 37.1.2. Unmatched Operators

core dumps and: 15.5.1. limit and ulimit

keysyms: 6.2. Using xev to Learn Keysym Mappings

network connectivity: 46.4. Where, Oh Where Did That Packet Go?

Perl code in Emacs editor: 19.2. Emacs Features: A Laundry List

recursion depth, messages about: 29.11.4. Functions Calling Functions: Factorials

setup files for account with hung terminal: 5.6. Checklist: Terminal Hangs When I Log In

su command, using to emulate accounts: 49.9. Substitute Identity with su

decimal numbers, sorting with sort: 22.5. Alphabetic and Numeric Sorting

declaring variables in Perl: 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy

decoding uuencoded tar files: 21.12.1. uuencoding

decompressing files, bunzip2 program: 15.6. Compressing Files to Save Space

dedent script, removing whitespace from text: 5.21. Tips for Copy and Paste Between Windows

deferencing references: 41.5.4. References

defining, Python functions: 42.3.2. Functions

<defunct> status under System V: 24.12. Destroying Processes with kill

DEL character: 12.4. Show Nonprinting Characters with cat -v or od -c

delayed execution: 25.1. Building Software Robots the Easy Way

at command: 25.5. The at Command

cron system: 25.2. Periodic Program Execution: The cron Facility

sleep command: 25.9. Waiting a Little While: sleep

delete command (awk): 20.10.7. Alphabetical Summary of Commands

delete command (ex): 20.4. Useful ex Commands

delete (d or D) commands, sed editor: 34.17. The Deliberate Scrivener

multiline delete: 34.19. Multiline Delete

delete function (Perl): 41.5.3. Hashes

DELETE key: 5.8. Setting Your Erase, Kill, and Interrupt Characters

Emacs editor: 19.1. Emacs: The Other Editor

erase character: 37.8. Cleaning script Files

location for: 3.18. A .cshrc.$HOST File for Per Host Setup

redefined, debugging with xevBACKSPACE: 6.2. Using xev to Learn Keysym Mappings

delete script: 14.7. A Faster Way to Remove Files Interactively

deleted files, archiving on tape: 14.17. Deleting Stale Files

deleted text, recovering with vi editor: 17.7. Get Back What You Deleted with Numbered Buffers

deleting

characters from a file with dd: 21.6. Low-Level File Butchery with dd

d command, sed editor: 34.5. sed Addressing Basics

directories: 14.16. Problems Deleting Directories

duplicate lines: 21.20. What Is (or Isn't) Unique?

Perl script, using: 22.7. lensort: Sort Lines by Length

extra characters with ^: 30.5. My Favorite Is ^^

files: 1.11. Filenames

14.1. The Cycle of Creation and Destruction

(see also removing files)

-inum and -exec operators, using with find command: 9.9. Running Commands on What You Find

by last access date: 14.17. Deleting Stale Files

confirmation before deleting: 14.5. Answer "Yes" or "No" Forever with yes

with Emacs: 19.2. Emacs Features: A Laundry List

preventing by making directories unwritable: 14.4. Tricks for Making rm Safer

program for: 14.5. Answer "Yes" or "No" Forever with yes

RCS system: 39.5. RCS Basics

wildcards and: 14.3. rm and Its Dangers

files with nonprint characters in names: 8.12. Showing Nonprintable Characters in Filenames

function definitions: 29.11.5. Conclusion

linked files: 10.4.1. Differences Between Hard and Symbolic Links

unconnected symbolic links: 8.16. oldlinks: Find Unconnected Symbolic Links

deleting files, archiving deleted files with tar: 14.17. Deleting Stale Files

denial-of-service attacks (DoS): 48.2. CERT Security Checklists

48.5. What We Mean by DoS

comsuming all resources: 48.5. What We Mean by DoS

manipulation of configuration information: 48.5. What We Mean by DoS

physical attacks on equipment: 48.5. What We Mean by DoS

swap space vulnerability in: 48.6.2. Checking Swap Space

dependency conflicts in package installation/removal: 40.5.3. Choosing Packages for Installation or Removal

dereferencing operator (->): 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy

deroff command: 16.9. Just the Words, Please

deroff w command: 16.4. Inside spell

desktops

display numbers: 47.7.1. Connecting to a Windows VNC server

Gnome and Enlightenment programs: 1.10. The Kernel and Daemons

rdesktop (RDP client for Unix): 47.9.2. rdesktop

sharing with VNC: 47.7. Sharing Desktops with VNC

connecting to Windows VNC server: 47.7.1. Connecting to a Windows VNC server

setting VNC up on Unix: 47.7.2. Setting up VNC on Unix

destroying processes with kill: 24.12. Destroying Processes with kill

/dev directory: 40.1. /usr/bin and Other Software Directories

43.1. Using Standard Input and Output

/dev/null file

examples: 35.15.2. Looping Until a Command Fails

36.27. Shell Lockfile

redirecting output to: 43.12. What Can You Do with an Empty File?

/dev/tty file: 43.3. Send (Only) Standard Error Down a Pipe

/dev/zero file: 43.12. What Can You Do with an Empty File?

device drivers: 44.1. Quick Introduction to Hardware

device drivers, resetting to kill processes: 24.18. Cleaning Up an Unkillable Process

"device independent" (DVI) printer language: 45.14. Printing Languages — PostScript, PCL, DVI, PDF

devices: 44.1. Quick Introduction to Hardware

dialup PPP session, setting up: 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

removable, mounting/umounting: 44.6. Mounting and Unmounting Removable Filesystems

kernel boot output, reading: 44.2. Reading Kernel Boot Output

kernel configuration: 44.3. Basic Kernel Configuration

loopback mounts: 44.7. Loopback Mounts

modems: 44.10. Win Is a Modem Not a Modem?

network, configuring with ifconfig: 44.8. Network Devices — ifconfig

network filesystems, mounting: 44.9. Mounting Network Filesystems — NFS, SMBFS

not recognized by kernel: 44.2. Reading Kernel Boot Output

serial consoles: 44.14. Decapitating Your Machine — Serial Consoles

sound cards: 44.13. Dealing with Sound Cards and Other Annoying Hardware

Universal Serial Bus (USB), configuring: 44.12. USB Configuration

/dev/null file: 9.21. grepping a Directory Tree

grep command, using with: 9.22. lookfor: Which File Has That Word?

replacing log files with symbolic links to: 15.3. Save Space with "Bit Bucket" Log Files and Mailboxes

/dev/tty file: 36.15. Overview: Open Files and File Descriptors

df command: 26.1. Timing Is Everything

output, parsing with sed: 36.23.4. Using sed

DHCP (Dynamic Host Configuration Protocol): 46.10. Dynamic Host Configuration Protocol (DHCP)

NAT and: 46.11. Gateways and NAT

dialback script: 28.18.1. Dialback

dialup session, setting up: 44.11. Setting Up a Dialup PPP Session

dialup terminal type: 5.3. Setting the Terminal Type When You Log In

dictionaries

ispell program, adding words to: 16.5. Adding Words to ispell's Dictionary

spell program: 16.4. Inside spell

system word file: 16.3. How Do I Spell That Word?

dictionary files for spell command: 16.1. The Unix spell Command

dictionary order, sorting in: 22.6.4. Dictionary Order

dierctory hierarchy: 40.1. /usr/bin and Other Software Directories

diff command: 11.1. Checking Differences with diff

-c option

added lines, listing of: 11.3. Context diffs

changed lines, marking of: 11.3. Context diffs

deletions, listing of: 11.3. Context diffs

difference sections, marking of: 11.3. Context diffs

listings, start of: 11.3. Context diffs

running on lists of files: 28.17. Dealing with Too Many Arguments

-e option: 11.1. Checking Differences with diff

-u option

added lines, listing of: 11.3. Context diffs

changed lines, marking of: 11.3. Context diffs

deletions, listing of: 11.3. Context diffs

difference sections, marking of: 11.3. Context diffs

listings, start of: 11.3. Context diffs

batch editing, use in: 20.6. Change Many Files by Editing Just One

cmp program vs.: 11.7. cmp and diff

comparing sets of files: 10.9. Renaming, Copying, or Comparing a Set of Files

context diffs: 11.3. Context diffs

cvs: 39.7. CVS Basics

CVS, use with: 39.4. Managing and Sharing Files with RCS and CVS

diff3 script: 11.2. Comparing Three Different Versions with diff3

output, feeding to patch program: 20.9. patch: Generalized Updating of Files That Differ

r option: 10.9. Renaming, Copying, or Comparing a Set of Files

sdif command: 11.4. Side-by-Side diffs: sdiff

tabstops, problems with: 11.6. Problems with diff and Tabstops

dig command: 29.11.2. Functions with Loops: Internet Lookup

46.9. Domain Name Service (DNS)

DNS queries with: 46.3. Status and Troubleshooting

dircolors command

-p option: 8.6.2. Configuring It

LS_COLORS environment variable, setting: 8.6.2. Configuring It

dircolors command (GNU): 4.10. Highlighting and Color in Shell Prompts

.dircolorsrc file: 8.6.2. Configuring It

8.6.2. Configuring It

directories

!$ sequence: 30.3. My Favorite Is !$

absolute pathnames and: 31.2. Using Relative and Absolute Pathnames

aliases for: 29.5. Korn-Shell Aliases

archived on tape drives, restoring: 38.6.1. Restoring a Few Files

automatic setup for entering and exiting: 31.13. Automatic Setup When You Enter/Exit a Directory

backing up

excluding files from backup: 38.9. On-Demand Incremental Backups of a Project

browsing with shell arrays: 9.23. Using Shell Arrays to Browse Directories

changing: 31.5. Saving Time When You Change Directories: cdpath

31.12. Marking Your Place with a Shell Variable

changing with c (shell function): 31.10. cd by Directory Initials

comparing with diff -r command: 10.9. Renaming, Copying, or Comparing a Set of Files

contents of: 10.2. What's Really in a Directory?

counting files in: 16.6. Counting Lines, Words, and Characters: wc

current: 31.4. How Does Unix Find Your Current Directory?

(see also current directory)

current directory: 24.3. Managing Processes: Overall Concepts

deep directory tree, finding files in: 9.2. Delving Through a Deep Directory Tree

deleting: 14.16. Problems Deleting Directories

directory tree

archives/backups of: 38.2. tar in a Nutshell

changing permissions of: 50.5. Using chmod to Change File Permission

compressing: 15.7. Save Space: tar and compress a Directory Tree

15.9. Compressing a Directory Tree: Fine-Tuning

copying with tar and pipes: 10.13. Copying Directory Trees with tar and Pipes

grepping: 9.21. grepping a Directory Tree

skipping parts with find command: 9.27. Skipping Parts of a Tree in find

directory tree, duplicating: 9.17. Duplicating a Directory Tree

dirname command: 36.13.1. Introduction to basename and dirname

Emacs editor, viewing and manipulating in: 19.2. Emacs Features: A Laundry List

emacs hacks: 19.12. Directories for Emacs Hacks

files, finding: 8.1. Everything but the find Command

change and modification times: 8.2. The Three Unix File Times

oldest and newest with ls -t and ls -u: 8.3. Finding Oldest or Newest Files with ls -t and ls -u

subdirectories, listing with ls -R: 8.4. List All Subdirectories with ls -R

files in: 1.14. The Tree Structure of the Filesystem

finding files

GNU ls command, features of: 8.7. Some GNU ls Features

8.8. A csh Alias to List Recently Changed Files

listing directories with ls -d: 8.5. The ls -d Option

home: 1.15. Your Home Directory

finding (for anyone): 31.11. Finding (Anyone's) Home Directory, Quickly

linking: 10.7. Linking Directories

links to: 10.4.2. Links to a Directory

listing contents with ls -lai command: 10.4.1. Differences Between Hard and Symbolic Links

manual page files, searching for: 2.4. Searching Online Manual Pages

organization of: 7.1. What? Me, Organized?

access: 7.3. Access to Directories

bin directory for programs and scripts: 7.4. A bin Directory for Your Programs and Scripts

creating many: 7.7. Make More Directories!

creating new: 7.8. Making Directories Made Easier

naming files: 7.6. Naming Files

private or personal: 7.5. Private (Personal) Directories

ownership: 50.3. Who Will Own a New File?

permissions: 50.2. Tutorial on File and Directory Permissions

50.2. Tutorial on File and Directory Permissions

execute without read permission: 50.10. A Directory That People Can Access but Can't List

fully accessible directory within unreadable: 50.10. A Directory That People Can Access but Can't List

search access: 50.2.1. User, Group, and World

search permission: 50.2. Tutorial on File and Directory Permissions

sticky bit and: 50.4. Protecting Files with the Sticky Bit

printing files to: 28.4. Build Strings with { }

remotely mounted, hung terminals and: 5.6. Checklist: Terminal Hangs When I Log In

safer file deletion in: 14.8. Safer File Deletion in Some Directories

in search path: 27.6. Controlling Shell Command Searches

sharing local with SMB network: 47.2. Installing and Configuring Samba

sharing with SMB network: 47.6. Connecting to SMB Shares from Unix

subdirectories: 1.15. Your Home Directory

creating: 28.4. Build Strings with { }

temporary changes in: 43.7.2. Temporary Change of Directory and Environment

temporary, setting different for vi: 17.27. Out of Temporary Space? Use Another Directory

/u: 31.11. Finding (Anyone's) Home Directory, Quickly

write permission, denying to limit file creation: 15.5.2. Other Ideas

directory stack: 31.7. The Shells' pushd and popd Commands

clearing with dirs -c: 31.7. The Shells' pushd and popd Commands

clearing with popd command: 31.7. The Shells' pushd and popd Commands

directorys

moving to temporarily with pushd and popd commands: 31.7. The Shells' pushd and popd Commands

Dired mode (Emacs): 19.2. Emacs Features: A Laundry List

dirname command: 36.13. Using basename and dirname

bugs in: 36.13.1. Introduction to basename and dirname

loops, using with: 36.13.2. Use with Loops

dirs command: 31.7. The Shells' pushd and popd Commands

-c option, clearing the stack: 31.7. The Shells' pushd and popd Commands

output in prompt, using: 4.14. dirs in Your Prompt: Better Than $cwd

dirsfile variable for tcsh shells: 3.3. Shell Setup Files — Which, Where, and Why

disabling bash built-in commands: 27.9. Which One Will bash Use?

disk controllers: 44.1. Quick Introduction to Hardware

disk quotas: 50.14. Why Can't You Change File Ownership?

file permissions, changing without chown: 50.15. How to Change File Ownership Without chown

disk space

hard links vs. symbolic links: 31.13. Automatic Setup When You Enter/Exit a Directory

reports on: 15.8. How Much Disk Space?

swap space for temporary files: 48.6.2. Checking Swap Space

disk space, optimizing: 15.1. Disk Space Is Cheap

compressed tar archive: 38.2. tar in a Nutshell

compressing a directory tree: 15.7. Save Space: tar and compress a Directory Tree

fine-tuning: 15.9. Compressing a Directory Tree: Fine-Tuning

compressing files: 15.6. Compressing Files to Save Space

emptyig files: 15.2. Instead of Removing a File, Empty It

executable binaries, stripping: 15.10. Save Space in Executable Files with strip

limiting file sizes: 15.5. Limiting File Sizes

links and: 15.4. Save Space with a Link

log files and: 15.3. Save Space with "Bit Bucket" Log Files and Mailboxes

quotas on disk usage: 15.11. Disk Quotas

disks: 44.1. Quick Introduction to Hardware

partitioning: 44.4. Disk Partitioning

PCs: 44.4. Disk Partitioning

removable, mounting/unmounting: 44.6. Mounting and Unmounting Removable Filesystems

disown command: 23.11. Disowning Processes

vs. nohup: 23.11. Disowning Processes

disowned processes

controlling terminal and: 24.6. The Controlling Terminal

killing parent processes by name: 24.15. Killing Processes by Name?

display command, vis vs.: 28.11. Repeating a Time-Varying Command

DISPLAY environment variable: 3.14. Terminal Setup: Testing Environment Variables

35.5. Predefined Environment Variables

35.8. The DISPLAY Environment Variable

checking setting in xwrist script: 36.26. Outputting Text to an X Window

hard-coded into shell setup file on remote machine: 6.10.2. Starting a Remote Client with rsh and ssh

setting for remote X client: 6.10.1. Starting Remote X Clients from Interactive Logins

DISTDIR environment variable: 40.9. Installation with FreeBSD Ports

distributed database, updating: 11.11. Even More Uses for make

distributed denial-of-service attacks (DDoS): 48.5. What We Mean by DoS

distribution release for software packages: 40.6.1. Configuring the sources.list File

Distutils program: 42.2. Installation and Distutils

dmesg command, getting last ten lines from: 12.8. How to Look at the End of a File: tail

DNS (Domain Name Service)

cache, checking: 46.9. Domain Name Service (DNS)

NETBIOS name: 47.2. Installing and Configuring Samba

queries, making with dig: 46.3. Status and Troubleshooting

DNS MX (mail exchanger) record for a host, looking up: 29.11.2. Functions with Loops: Internet Lookup

do command (awk): 20.10.7. Alphabetical Summary of Commands

DocBook: 45.13. Formatting Markup Languages — troff, LATEX, HTML, and So On

doctor program: 19.13. An Absurd Amusement

documentation: 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy

(see also (see also manual pages)

Perl: 41.1. High-Octane Shell Scripting

41.4. Perl Boot Camp, Part 1: Typical Script Anatomy

domains, NT: 47.2. Installing and Configuring Samba

Doman Name Service (see DNS)

DoS (see denial-of-service attacks)

dos2unix application: 40.1. /usr/bin and Other Software Directories

dot (.) (see ., Under Symbols)

dot (.) files

showing with ls -a option: 8.9. Showing Hidden Files with ls -A and -a

10.4.1. Differences Between Hard and Symbolic Links

wildcard matching and: 33.2. Filename Wildcards in a Nutshell

double quotes (see ", under Symbols)

27.12.2. How Quoting Works

doubled word typing errors, finding: 16.7. Find a a Doubled Word

downloading files from the Internet with wget: 40.7. Interruptable gets with wget

drive controllers

kernel boot output for: 44.2. Reading Kernel Boot Output

dselect tool: 40.5. Using Debian's dselect

access method, choosing: 40.5.1. Choosing the Access Method

choosing packages for installation or removal: 40.5.3. Choosing Packages for Installation or Removal

configuring packages: 40.5.6. Configuring Packages

exiting: 40.5.8. Exiting dselect

exiting select function: 40.5.4. Exiting the Select Function

installing packages: 40.5.5. Installing Packages

removing packages: 40.5.7. Removing Packages

updating information on available packages: 40.5.2. Updating Information on Available Packages

du command: 16.6. Counting Lines, Words, and Characters: wc

-k option: 15.8. How Much Disk Space?

-s option: 15.8. How Much Disk Space?

dump command

arguments, correct order for: 38.12. Getting tar's Arguments in the Right Order

industrial strength backups with: 38.14. Industrial Strength Backups

dumping files to the screen: 12.1. Cracking the Nut

cat command: 12.2. What Good Is a cat?

duplicate lines, deleting: 21.20. What Is (or Isn't) Unique?

22.6.1. Dealing with Repeated Lines

Perl script, using: 22.7. lensort: Sort Lines by Length

DVD-ROMs: 44.6. Mounting and Unmounting Removable Filesystems

DVI ("device independent") printer language: 45.14. Printing Languages — PostScript, PCL, DVI, PDF

DVORAK keyboards: 6.1. Defining Keys and Button Presses with xmodmap

6.1. Defining Keys and Button Presses with xmodmap

dynamic expansion in Emacs: 19.6. Command Completion

Dynamic Host Configuration Protocol (DHCP): 46.10. Dynamic Host Configuration Protocol (DHCP)

dynamic IP addresses: 46.1.1. Internet Protocol (IP)

dynamic prompts: 4.3. Dynamic Prompts

simulating: 4.4. Simulating Dynamic Prompts

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