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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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