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# Index: O

.o filename extension : UNIX Power Tools, 1.17. Filename Extensions
oawk scripting language : (see awk scripting language)
obase command : UNIX Power Tools, 49.2. bc: Hexadecimal or Binary Conversion
object files
  file extension : UNIX Power Tools, 1.17. Filename Extensions
  generating : UNIX in a Nutshell, Chapter 2, Reference: as
  removing information from : UNIX in a Nutshell, Chapter 2, Reference: strip
object-code libraries : Learning the Korn Shell, 6.1.3.1. More About C Compilers
obsolete features in next ksh release : Learning the Korn Shell, A.7. The Future of the Korn Shell
obtaining source code
  awk
    sed & awk, Availability of sed and awk
    sed & awk, 11.3.1. MKS awk
    sed & awk, 11.3.2. Thompson Automation awk (tawk)
    sed & awk, 11.3.3. Videosoft VSAwk
  examples
    sed & awk, Sample Programs
    sed & awk, Obtaining Example Source Code
  gawk : sed & awk, 11.2.3. GNU awk (gawk)
  mawk : sed & awk, 11.2.4. Michael's awk (mawk)
  sed : sed & awk, Availability of sed and awk
ocrnl flag : UNIX Power Tools, 41.2.1. How We Made It This Far (Back?)
octal dumps, producing : UNIX in a Nutshell, Chapter 2, Reference: od
octal numbers
  UNIX Power Tools, 1.23. File Access Permissions
  sed & awk, 7.6. Expressions
  for ASCII characters
    UNIX Power Tools, 7.8. Highlighting in Shell Prompts
    UNIX Power Tools, 51.3. ASCII Characters: Listing and Getting Values
  interpreting : UNIX Power Tools, 45.35.1. With echo
  for permissions : UNIX Power Tools, 17.15. Searching for Files by Permission
od command : UNIX in a Nutshell, Chapter 2, Reference: od
  -c option
    UNIX Power Tools, 18.2. What's Really in a Directory
    UNIX Power Tools, 23.15. Using unlink to Remove a File with a Strange Name
    UNIX Power Tools, 25.7. Show Non-Printing Characters with cat -v or od -c
  looking at characters : UNIX Power Tools, 41.7. Reading Verrrry Long Lines from the Terminal
off-peak hours, taking advantage of : UNIX Power Tools, 40.1. Off-Peak Job Submission
offset script
  UNIX Power Tools, 35.7. offset: Indent Text
  UNIX Power Tools, 52.4. Quick Descriptions of What's on the Disc
OFMT variable
  sed & awk, 7.7. System Variables
  sed & awk, 7.9. Formatted Printing
OFS variable : sed & awk, 7.7. System Variables
oldlinks script
  UNIX Power Tools, 16.28. oldlinks: Find Unconnected Symbolic Links
  UNIX Power Tools, 52.4. Quick Descriptions of What's on the Disc
OLDPWD variable
  Learning the Korn Shell, 3.4.3.1. Miscellaneous Variables
  Learning the Korn Shell, 4.5. Advanced Examples: pushd and popd
  Learning the Korn Shell, 5.1.1. Exit Status and Return
  Learning the Korn Shell, 7.3. Command-line Processing
  UNIX in a Nutshell, 4.3.2. Built-in Shell Variables
olid hardware : UNIX Power Tools, 20.6. Writing a Tape Drive on a Remote Machine
on-line manual : (see man pages)
onintr command (csh) : UNIX in a Nutshell, Chapter 5, Reference: onintr
online archive, software : UNIX Power Tools, 52.7.2. Online Archive
online documentation : (see manual pages)
online manual source file extension : UNIX Power Tools, 1.17. Filename Extensions
open command (ex) : UNIX in a Nutshell, Chapter 9, Reference: open
OPEN LOOK : Learning the Korn Shell, A.3. wksh
open mode : (see ex editor, open mode)
opening a file (vi)
  Learning the vi Editor, 1.1. Opening and Closing Files
  Learning the vi Editor, 1.1.1. Opening a File
  Learning the vi Editor, 1.1.2. Problems Opening Files
openwin command : UNIX in a Nutshell, Chapter 2, Reference: openwin
OpenWindows
  configuring : UNIX in a Nutshell, Chapter 2, Reference: openwin
  programs and utilities : UNIX in a Nutshell, Chapter 2, Reference: openwin
operating system, definition of : Learning the UNIX Operating System, The UNIX Operating System
operators
  arithmetic : (see arithmetic operators)
  assignment : (see assignment operators)
  awk : (see awk scripting language)
  bitwise/logical
    UNIX Power Tools, 45.28. Quick Reference: expr
    UNIX Power Tools, 47.4.3.3. Bitwise and Logical Operators
  Boolean
    sed & awk, 7.8. Relational and Boolean Operators
    sed & awk, 11.1.4. Variables as Boolean Patterns
  C shell : UNIX in a Nutshell, 5.4.1. Operators
  comparison : UNIX Power Tools, 47.4.3.4. Comparison Operators
  file inquiry : UNIX Power Tools, 47.4.3.5. File Inquiry Operators
  postfix versus prefix : sed & awk, 7.6. Expressions
  precedence in C shell : UNIX Power Tools, 47.4.2. Expressions
  relational
    UNIX Power Tools, 45.28. Quick Reference: expr
    sed & awk, 7.8. Relational and Boolean Operators
  string editing : UNIX Power Tools, 45.12. Parameter Substitution
  unmatched : UNIX Power Tools, 46.1.2. Unmatched Operators
opost flag : UNIX Power Tools, 41.2.1. How We Made It This Far (Back?)
OPTARG variable : Learning the Korn Shell, 6.1.3. getopts
OPTARGET shell variable : UNIX in a Nutshell, 4.3.2. Built-in Shell Variables
OPTIND
  Learning the Korn Shell, 6.1.3. getopts
  UNIX in a Nutshell, 4.3.2. Built-in Shell Variables
options
  Learning the Korn Shell, 3. Customizing Your Environment
  Learning the Korn Shell, 3.3. Options
  sed & awk, 2.2. Command-Line Syntax
  sed & awk, 2.3.1. Specifying Simple Instructions
  (see also under specific option)
  awk : sed & awk, 2.4.3. Summary of Options
  bgnice
    Learning the Korn Shell, 3.3. Options
    Learning the Korn Shell, 8.5.2. Advantages and Disadvantages of Coroutines
    Learning the Korn Shell, A.6. Workalikes on PC Platforms
  combining : sed & awk, 2.3.2.3. Mixing options (POSIX)
  command-line : (see command-line options)
  dash : (see command-line options)
  emacs
    Learning the Korn Shell, 2.1. Enabling Command-line Editing
    Learning the Korn Shell, 3.3. Options
  ignoreeof : Learning the Korn Shell, 3.3. Options
  keyword : Learning the Korn Shell, 3.5.1. Environment Variables
    obsolescence in next ksh release : Learning the Korn Shell, A.7. The Future of the Korn Shell
  list of : Learning the Korn Shell, B.1. Invocation Options
    set -o : Learning the Korn Shell, B.5. Options
    typeset : Learning the Korn Shell, B.6. Typeset Options
  list of those not supported in pdksh : Learning the Korn Shell, A.4. pdksh
  markdirs : Learning the Korn Shell, 3.3. Options
  monitor
    Learning the Korn Shell, 8.2. Job Control
    Learning the Korn Shell, A.6. Workalikes on PC Platforms
  in next ksh release : Learning the Korn Shell, A.7. The Future of the Korn Shell
  noclobber
    Learning the Korn Shell, 3.3. Options
    Learning the Korn Shell, 7.1. I/O Redirectors
    Learning the Korn Shell, 10.2.3. Types of Global Customization
    Learning the UNIX Operating System, 5.1.1.1. The > operator
    UNIX Power Tools, 6.8. Shell Variables
    UNIX Power Tools, 6.9. Special C Shell Variables
    UNIX Power Tools, 13.6. Safe I/O Redirection with noclobber
    UNIX Power Tools, 23.7. Safer File Deletion in Some Directories
    UNIX in a Nutshell, 5.3.3. Predefined Shell Variables
  noexec : Learning the Korn Shell, 9.1.1. Set Options
    turning on and off : Learning the Korn Shell, 9.1.1. Set Options
  noglob : Learning the Korn Shell, 3.3. Options
  privileged
    Learning the Korn Shell, 10.3.4. Privileged Mode
    Learning the Korn Shell, A.6. Workalikes on PC Platforms
  sed : sed & awk, 2.3.2.4. Summary of options
  trackall
    Learning the Korn Shell, 3.3. Options
    Learning the Korn Shell, 10.2.3. Types of Global Customization
    obsolescence in next ksh release : Learning the Korn Shell, A.7. The Future of the Korn Shell
  turning on and off
    Learning the Korn Shell, 3.3. Options
    Learning the Korn Shell, 9.1.1. Set Options
  verbose : Learning the Korn Shell, 9.1.1. Set Options
  vi
    Learning the Korn Shell, 2.1. Enabling Command-line Editing
    Learning the Korn Shell, 3.3. Options
  xtrace : Learning the Korn Shell, 9.1.1. Set Options
opttest script : UNIX Power Tools, 52.4. Quick Descriptions of What's on the Disc
OR (||) operator : sed & awk, 7.8. Relational and Boolean Operators
order of operations : sed & awk, 3.1. That's an Expression
  commands in scripts : sed & awk, 4.1. Applying Commands in a Script
orphans : (see processes, in pathological states)
ORS variable
  sed & awk, 7.7. System Variables
  sed & awk, 7.7.1. Working with Multiline Records
OS/2 : Learning the Korn Shell, A.6. Workalikes on PC Platforms
  Version 2 : Learning the Korn Shell, 8. Process Handling
OSF/Motif : Learning the Korn Shell, A.3. wksh
other shells : (see entries for individual shells)
out of band approach for flow control : UNIX Power Tools, 41.2.4. Flow Control (We Hope)
output : (see I/O)
output, redirecting : (see >; redirection)
overwrite mode : UNIX Power Tools, 32.5. Putting Emacs in Overwrite Mode
overwriting files
  Learning the UNIX Operating System, 5.1.1.1. The > operator
  UNIX Power Tools, 8.4. Command Evaluation and Accidentally Overwriting Files
ownership, file
  Learning the UNIX Operating System, 3.1.8.1. ls
  UNIX Power Tools, 22.2.1. User, Group, and World
  UNIX Power Tools, 22.3. Who Will Own a New File?
  BSD UNIX and : UNIX Power Tools, 22.20. Why Can't You Change File Ownership Under BSD UNIX?
  changing
    UNIX Power Tools, 22.21. How to Change File Ownership Without chown
    UNIX in a Nutshell, Chapter 2, Reference: chgrp
    UNIX in a Nutshell, Chapter 2, Reference: chown
  group : (see groups)
  searching by : UNIX Power Tools, 17.16. Searching by Owner and Group

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