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Index: O

object oriented programming (OOP) in Perl: 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy

objects

file extension: 1.12. Filename Extensions

Python: 42.3.3. Everything's an Object

creating: 42.3.3. Everything's an Object

file objects: 42.3.5. I/O and Formatting

resources in applications, association with: 6.3. X Resource Syntax

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

releasing resources with close( ): 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy

octal character strings: 4.10. Highlighting and Color in Shell Prompts

octal number, permissions written as: 50.5. Using chmod to Change File Permission

octal numbers

permissions, writing as: 50.2.1. User, Group, and World

values of nonprinting characters: 8.12. Showing Nonprintable Characters in Filenames

od -c command, displalying nonprintable files: 12.4. Show Nonprinting Characters with cat -v or od -c

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

od c command, dumping raw directory contets to screen: 10.2. What's Really in a Directory?

od command, -c option: 14.14. Using unlink to Remove a File with a Strange Name

offset script: 21.7. offset: Indent Text

-ok operator (find command): 9.9. Running Commands on What You Find

oldlinks script: 8.16. oldlinks: Find Unconnected Symbolic Links

on-disk address of file data blocks: 14.2. How Unix Keeps Track of Files: Inodes

One-Step (GNU-Darwin auto-installer for OS X): 40.8. The curl Application and One-Step GNU-Darwin Auto-Installer for OS X

online documentation (see info command manual pages)

online manual source file extension: 1.12. Filename Extensions

open files, file descriptors and: 36.15. Overview: Open Files and File Descriptors

OpenSSH: 51.3. Free SSH with OpenSSH

Pluggable Authentication Modules (PAM), problems with: 51.5. General and Authentication Problems

operating systems

BSD Unix, versions of make utility: 40.3. Which make?

filename wildcards: 33.2. Filename Wildcards in a Nutshell

shells emulating operating systems: 33.3. Who Handles Wildcards?

graphical interfaces: 1.2. Power Grows on You

interoperability: 47.1. Building Bridges

POSIX standard for interoprability: 1.3. The Core of Unix

operators

( ) (subshell) operator: 3.3. Shell Setup Files — Which, Where, and Why

= (assignment) operator: 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy

: (colon), string editing: 28.5. String Editing (Colon) Operators

&&: 10.13. Copying Directory Trees with tar and Pipes

arithmetic: 36.21.1. Syntax

array: 41.5.2. Arrays

array-expanding: 9.23.2. Expanding Ranges

awk utility: 20.10.4. Operators

20.10.4. Operators

Boolean: 41.5.1. Scalars

in expressions: 32.3. Understanding Expressions

precedence of: 32.3. Understanding Expressions

for find command: 9.1. How to Use find

-exec: 9.9. Running Commands on What You Find

-name: 9.4. Looking for Files with Particular Names

search operators: 9.6. Be an Expert on find Search Operators

time (-mtime, -atime, and -ctime): 9.7. The Times That find Finds

9.8. Exact File-Time Comparisons

find command, ! and -name: 13.3. Finding Text That Doesn't Match

flow-control, for loops in Perl: 41.6. Perl Boot Camp, Part 3: Branching and Looping

:gt operator (C shell): 4.14. dirs in Your Prompt: Better Than $cwd

if command, awk: 20.10.7. Alphabetical Summary of Commands

logical: 36.21.1. Syntax

<< (here document) operator: 28.13. Here Document Example #1: Unformatted Form Letters

numerical: 41.5.1. Scalars

parameter substitution (Bourne shell): 36.7. Parameter Substitution

precedence of, Boolean operators in Perl: 41.5.1. Scalars

redirect and append (>>): 17.12. Appending to an Existing File

relational: 36.21.1. Syntax

41.5.1. Scalars

in shells, listing with definitions: 27.17. "Special" Characters and Operators

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

string: 4.6. Faster Prompt Setting with Built-ins

41.5.1. Scalars

string editing: 36.7. Parameter Substitution

unmatched: 37.1.2. Unmatched Operators

/opt directory: 2.4. Searching Online Manual Pages

40.1. /usr/bin and Other Software Directories

optimizing disk space: 15.1. Disk Space Is Cheap

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

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

limiting files sizes: 15.5. Limiting File Sizes

links, using: 15.4. Save Space with a Link

quotas on disk usage: 15.11. Disk Quotas

opttest script: 35.24. Standard Command-Line Parsing

or (-o) operator, case command: 36.25. Testing Two Strings with One case Statement

OR operator: 9.6. Be an Expert on find Search Operators

| in extended regular expressions: 32.15. Extended Regular Expressions

| (logical OR) operator: 36.21.1. Syntax

agrep command, searching for multiple patterns: 13.6. Approximate grep: agrep

evaluating OR expressions: 9.12. Finding Many Things with One Command

OR operator (||): 20.10.2.1. Patterns

28.16. Separating Commands with Semicolons

or operator (Boolean or): 41.5.1. Scalars

orphans: 24.7.2. BSD

out-of-date links (see symbolic links, stale)

output (see input/output standard output)

overriding event translations: 6.4. X Event Translations

overwrite mode (Emacs): 19.5. Putting Emacs in Overwrite Mode

overwriting files: 27.4. Command Evaluation and Accidentally Overwriting Files

ownership, file: 14.2. How Unix Keeps Track of Files: Inodes

changing with chown function in Perl: 41.8. Perl Boot Camp, Part 5: Perl Knows Unix

changing without chown command: 50.15. How to Change File Ownership Without chown

determining: 50.3. Who Will Own a New File?

directory, setting sticky bit: 50.4. Protecting Files with the Sticky Bit

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

groups: 49.6. Groups and Group Ownership

50.2.2. Which Group is Which?

groups, determining for: 49.5. Group Permissions in a Directory with the setgid Bit

permissions: 50.2. Tutorial on File and Directory Permissions

remote files, scp -p command and: 51.7. Server and Client Problems

security and: 50.1. Introduction to File Ownership and Security

user, group, and world: 50.2.1. User, Group, and World

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