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## Index: V

-v (verbose) option: 36.18. Shell Scripts On-the-Fly from Standard Input
values function (Perl): 41.5.3. Hashes
values, Python objects: 42.3.3. Everything's an Object
/var directory: 40.1. /usr/bin and Other Software Directories
variable-length records, converting to/from fixed length: 21.13. Text Conversion with dd
variable substitutions: 1.8. Anyone Can Program the Shell
  Bourne shell quoting and: 27.12.2. How Quoting Works
  editing by shells: 28.5. String Editing (Colon) Operators
  editing with : (colon) string editing operators: 28.5. String Editing (Colon) Operators
variable-width columns, creating with column utility: 21.16. Make Columns Automatically with column
variables
  awk utility: 20.10.3. awk System Variables
  class variables (Python): 42.3.3. Everything's an Object
  environment (see environment variables)
  inheritance of: 35.9. Shell Variables
  instance variables (Python): 42.3.3. Everything's an Object
  multiple, creating for loops with: 36.12. Making a for Loop with Multiple Variables
  Perl (see Perl)
  resource (X Window System): 6.3. X Resource Syntax
  scanning contents with eval: 36.12. Making a for Loop with Multiple Variables
  set to word lists: 37.5. Quoting and Command-Line Parameters
  shell (see shell variables)
  substitution of (see variable substitutions)
/var/log/lastlog file: 3.1. What Happens When You Log In
/var/log/wtmp file: 3.1. What Happens When You Log In
/var/run/utmp file: 3.1. What Happens When You Log In
varying commands while repeating them: 28.8. Repeating Commands
Vaults of Parnassus (Python repository): 42.2. Installation and Distutils
verbose option (Bourne shell): 36.18. Shell Scripts On-the-Fly from Standard Input
verbose shell variable: 27.15. Verbose and Echo Settings Show Quoting
version control systems: 39.4. Managing and Sharing Files with RCS and CVS
  CVS: 39.7. CVS Basics
  Emacs support of: 19.2. Emacs Features: A Laundry List
  RCS: 39.5. RCS Basics
  saving every file version: 38.4. More Ways to Back Up
versions
  of commands: 2.6. Which Version Am I Using?
  Perl: 41.2. Checking your Perl Installation
    verifying on your system: 41.3. Compiling Perl from Scratch
  UNIX: 0.6. About Unix Versions
vgrep script: 33.7.2. The vgrep Script
vi editor: 17.1. The vi Editor: Why So Much Material?
  ^ and $ characters, use of: 32.5. Regular Expressions: The Anchor Characters ^ and $
  abbreviations: 17.23. vi Word Abbreviation
    commands, using as: 17.24. Using vi Abbreviations as Commands (Cut and Paste Between vi's)
    fixing typos with: 17.25. Fixing Typos with vi Abbreviations
  appending to existing file: 17.12. Appending to an Existing File
  autowrite option: 23.6. Job Control and autowrite: Real Timesavers!
  capitalizing words: 17.16. Capitalizing Every Word on a Line
  centering lines of text: 21.8. Centering Lines in a File
  command-line editing: 30.14.1. vi Editing Mode
  compound searches: 17.22. vi Compound Searches
  confirming substitutions in: 17.9. Confirming Substitutions in vi
  counting occurrences and stopping search wraps: 17.15. Counting Occurrences; Stopping Search Wraps
  custom commands, creating: 18.2. Save Time and Typing with the vi map Commands
    @-functions: 18.4. vi @-Functions
    cursor motion in text-input mode without arrow keys: 18.11. Text-Input Mode Cursor Motion with No Arrow Keys
    file-backup macros: 18.14. File-Backup Macros
    keymaps for pasting into window running vi: 18.5. Keymaps for Pasting into a Window Running vi
    macro for splitting long lines: 18.13. vi Macro for Splitting Long Lines
    map commands: 18.2. Save Time and Typing with the vi map Commands
    mapping keys in vi, further examples: 18.8. More Examples of Mapping Keys in vi
    maps for repeated edits: 18.7. Maps for Repeated Edits
    noremap command: 18.12. Don't Lose Important Functions with vi Maps: Use noremap
    protecting keys from interpretation by ex: 18.6. Protecting Keys from Interpretation by ex
    repeating a keymap: 18.9. Repeating a vi Keymap
    typing in uppercase without CAPS LOCK: 18.10. Typing in Uppercase Without CAPS LOCK
  defining alternate vi environments: 17.5. Local Settings for vi
  deleting text blocks by patterns: 17.13. Moving Blocks of Text by Patterns
  development of: 5.2. The Idea of a Terminal Database
  file ownership: 50.3. Who Will Own a New File?
  file recovery with vi -r: 17.19. vi File Recovery Versus Networked Filesystems
    recovered buffers, cautions about: 17.20. Be Careful with vi -r Recovered Buffers
  filtering text through Unix command: 17.18. Filtering Text Through a Unix Command
    fmt command, neatening lines with: 17.28. Neatening Lines
  grep command, command substitution with: 28.14. Command Substitution
  keys available for user-defined commands: 18.2.1. Command Mode Maps
  line vs. character commands: 17.26. vi Line Commands Versus Character Commands
  local settings for: 17.5. Local Settings for vi
  marking place with m command: 17.29. Finding Your Place with Undo
  moving blocks of text by patterns: 17.13. Moving Blocks of Text by Patterns
  multiple setup files: 17.17. Per-File Setups in Separate Files
  pattern matches, global commands with: 17.14. Useful Global Commands (with Pattern Matches)
  recovering past deletions in numbered buffers: 17.7. Get Back What You Deleted with Numbered Buffers
  regular expressions in search and replacement patterns, delimiting: 34.8. Delimiting a Regular Expression
  requote script, using: 5.21. Tips for Copy and Paste Between Windows
  running ex scripts: 20.5. Running Editing Scripts Within vi
  saving old and new version of file: 17.10. Keep Your Original File, Write to a New File
  saving part of a file: 17.11. Saving Part of a File
  search patterns and global commands, using: 17.8. Using Search Patterns and Global Commands
    global searches: 17.8.1. Global Searches
  setting up with .exrc file: 17.30. Setting Up vi with the .exrc File
  shell escapes: 17.21. Shell Escapes: Running One UnixCommand While Using Another
  signals, ignoring: 24.11. Killing Foreground Jobs
  switching between files: 17.3. Editing Multiple Files with vi
    buffers, using to copy or move text: 17.6. Using Buffers to Move or Copy Text
    transferring text with yank buffers: 17.4. Edits Between Files
  temporary space, running out of: 17.27. Out of Temporary Space? Use Another Directory
  translating strings with tr -d command: 21.11. Hacking on Characters with tr
vim editor: 17.1. The vi Editor: Why So Much Material?
virtual consoles (Linux): 4.12. Show Subshell Level with $SHLVL
  23.12. Linux Virtual Consoles
  switching between: 5.1. There's a Lot to Know About Terminals
    23.12.1. What Are They?
  tty-type, scrolling and copy and paste: 23.12.2. Scrolling, Using a Mouse
virtual machine running Windows: 47.8.1. VMWare
virtual memory statistics: 48.6.4. Other Checks
Virtual Network Computing (see VNC)
vis command: 28.8. Repeating Commands
  -d option: 28.11. Repeating a Time-Varying Command
  -s option: 28.11. Repeating a Time-Varying Command
  C shell history compared to: 28.11. Repeating a Time-Varying Command
  variations of (display, rep, watch): 28.11. Repeating a Time-Varying Command
VISUAL environment variable: 35.5. Predefined Environment Variables
Vixie cron: 25.2. Periodic Program Execution: The cron Facility
  crontab file, creating: 25.2.1. Execution Scheduling
  Linux shortcuts to cron tasks: 25.2.2. A Little Help, etc.
  month and day names in crontab entry time fields: 25.2.1. Execution Scheduling
vmstat command: 48.6.4. Other Checks
vmware program: 47.8.1. VMWare
VNC (Virtual Network Computing): 47.7. Sharing Desktops with VNC
  connecting to Windows VNC server: 47.7.1. Connecting to a Windows VNC server
  setting up on Unix: 47.7.2. Setting up VNC on Unix
vold daemon: 44.6. Mounting and Unmounting Removable Filesystems
VT Fonts menu (xterm): 5.17. The xterm Menus
  5.17. The xterm Menus
  5.18.1. VT Fonts Menu
  Escape Sequences and Selection, enabling: 5.18.2. Enabling Escape Sequence and Selection
VT Options menu (xterm): 5.17. The xterm Menus
  enabling scrollbars: 5.11. Working with Scrollbars
  mode toggles: 5.17. The xterm Menus
vulnerabilities: 48.1. Understanding Points of Vulnerability
  buffer overflow: 48.4. What We Mean by Buffer Overflow
  CERT web site information on: 48.3. Keeping Up with Security Alerts
  file modification without write access: 50.9. A Loophole: Modifying Files Without Write Access
  Microsoft security bulletins about: 48.3. Keeping Up with Security Alerts

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