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# Index: W

wait command : 38.16. Why You Can't Kill a Zombie
  in background jobs : 44.7. Exit Status of UNIX Processes
wallclock time
  39.3. The csh time variable
  39.5. Why Is the System So Slow?
watch command vs. vis command : 51.7. When You Get Impatient
watchq script
  38.11. Printer Queue Watcher: A Restartable Daemon Shell Script
  52.4. Quick Descriptions of What's on the Disc
wc command
  8.6.1. Portability
  29.6. Counting Lines, Words, and Characters: wc
Web, described : 1.33. UNIX Networking and Communications
weekday in crontab entries : 40.12.1. Execution Scheduling
werase key : 5.9. Setting Your Erase, Kill, and Interrupt Characters
whatis command : 50.4. whatis: One-Line Command Summaries
  advantages : 50.4. whatis: One-Line Command Summaries
  apropos compared to : 50.4. whatis: One-Line Command Summaries
  examples : 50.4. whatis: One-Line Command Summaries
whence command : 4.10. Find All Command Versions with whereiz
whereis command
  16.10. findcmd: Find a Command in Your Search Path
  50.5. whereis: Finding Where a Command Is Located
  -b option : 50.5. whereis: Finding Where a Command Is Located
  examples
    44.21. Picking a Name for a New Command
    50.5. whereis: Finding Where a Command Is Located
  -m option : 50.5. whereis: Finding Where a Command Is Located
  -s option : 50.5. whereis: Finding Where a Command Is Located
  -u option : 50.5. whereis: Finding Where a Command Is Located
whereiz script
  4.10. Find All Command Versions with whereiz
  52.4. Quick Descriptions of What's on the Disc
which command
  16.10. findcmd: Find a Command in Your Search Path
  50.8. Which Version Am I Using?
  -a option : 4.10. Find All Command Versions with whereiz
  alternatives to : 50.8. Which Version Am I Using?
  examples
    44.21. Picking a Name for a New Command
    50.8. Which Version Am I Using?
  setting the prompt variable : 2.10. Gotchas in set prompt Test
which program : 52.4. Quick Descriptions of What's on the Disc
while command (awk) : 33.11.7. Alphabetical Summary of Commands
while loops
  44.10.2. Looping Until a Command Fails
  44.15.2. With a Loop
  in C shell : 47.4.2. Expressions
  case statement used in : 45.22. Handling Files Line-by-Line
  case statement used with : 44.17. Handling Arguments with while and shift
  examples
    44.10.2. Looping Until a Command Fails
    44.17. Handling Arguments with while and shift
    45.32. A Better read Command: grabchars
  for loops compared to : 45.16. Standard Input to a for Loop
  handling command-line arguments : 44.17. Handling Arguments with while and shift
  jot command in : 45.11. The Multipurpose jot Command
  multiple commands : 45.19. A while Loop with Several Loop Control Commands
  read command used in
    45.16. Standard Input to a for Loop
    45.22. Handling Files Line-by-Line
  redirected : 45.22. Handling Files Line-by-Line
  shift command used with : 44.17. Handling Arguments with while and shift
  test command used with : 44.17. Handling Arguments with while and shift
  until loops compared to : 44.10.2. Looping Until a Command Fails
whitespace : 1.2. Who Listens to What You Type?
  adding or deleting : 25.9. Adding and Deleting White Space
  adding/deleting : 25.13. pushin: Squeeze Out Extra White Space
  cat command and : 25.6. What's in That White Space?
  double-spacing : 25.12. Double Space, Triple Space ...
  in filenames
    8.16. Quoting Handles Special Characters in Filenames
    16.13. Can't Access a File? Look for Spaces in the Name
  newline character : 1.29. When Is a File Not a File?
  newline characters
    4.9. Setting Up vi with the .exrc File
    8.6.1. Portability
    25.10. Squash Extra Blank Lines
  problems with xargs : 9.22. xargs: Problems with Spaces and Newlines
  TAB characters
    8.18. Here Documents
    24.6. Save Space with Tab Characters
  wc command and : 29.6. Counting Lines, Words, and Characters: wc
"who are you?" error message : 50.12. Common UNIX Error Messages
who command
  9.16. Command Substitution
  51.4. Who's On?
  52.4. Quick Descriptions of What's on the Disc
  examples : 44.2. Writing a Simple Shell Program
  on PowerTools disk : 51.4. Who's On?
whoami command : 2.12. Automatic Setups for Different Terminals
  errors caused by : 50.12. Common UNIX Error Messages
wildcard characters
  in case statements : 44.6. Pattern Matching in case Statements
wildcards
  1.16. Wildcards
  21.14. Automatically Appending the Date to a Filename
  (see also pattern matching; special characters)
  !$ sequence with : 11.6. Using !$ for Safety with Wildcards
  with aliases : 8.9. Wildcards Inside of Aliases
  creating files : 9.4. Use Wildcards to Create Files?
  deleting files and : 23.2. rm and Its Dangers
  in directory names : 17.2. Delving Through a Deep Directory Tree
  file-naming : 15.1. File Naming Wildcards
  find command and
    17.4. Looking for Files with Particular Names
    17.18. Using "Fast find"
  in case statements : 44.5. Test String Values with Bourne Shell case
  in for loops : 44.16. Handling Command-Line Arguments with a for Loop
  matching dot files : 15.5. Matching All "Dot Files" with Wildcards
  passing to programs : 1.18. Who Handles Wildcards?
  in pathnames
    15.1. File Naming Wildcards
    15.6. Maybe You Shouldn't Use Wildcards in Pathnames
  for regular expressions : (see regular expressions)
  regular expression versus : 26.2. Don't Confuse Regular Expressions with Wildcards
  set command using : 44.19. The Bourne Shell set Command
  for special filename characters : 23.12. Using Wildcards to Delete Files with Strange Names
  tar archives and : 20.9. When a Program Doesn't Understand Wildcards
window sessions
  unlocking : 42.2. Fixing a Hung Terminal or Job
window variable
  for setting screen size : 42.5. Checklist: Screen Size Messed Up?
windows
  checking height and width : 42.6.2. Screen Width and Height: screensize
  running software written for ASCII terminals : 41.8. ptys and Window Systems
  testing for exactly 80 columns : 42.6.1. Single Line Screen Width: 80cols
  testing long-line wrapping : 42.6.3. Set Width, Test Line Wrapping: longlines
with : (see also under specific filename (at first
word lists
  arrays compared to : 47.5. Using C Shell Arrays
  in C shells : 47.5. Using C Shell Arrays
  variables set to : 46.7. Quoting and Command-Line Parameters
word vectors : 8.12. Which One Will the C Shell Use?
word-erase character : 9.2. Fix a Line Faster with Line-Kill and Word-Erase
wordfreq script
  29.7. Count How Many Times Each Word Is Used
  52.4. Quick Descriptions of What's on the Disc
wordlists : (see dictionary files)
words
  counting
    29.6. Counting Lines, Words, and Characters: wc
    29.7. Count How Many Times Each Word Is Used
  doubled : 29.8. Find a a Doubled Word
  extracting : 29.10. Just the Words, Please
  lists of : (see word lists)
  searching multiple files for : 17.21. lookfor: Which File Has that Word?
  spell checking : (see spell checking)
World Wide Web, described : 1.33. UNIX Networking and Communications
wraparound : 41.11. How termcap and terminfo Describe Terminals
write( ) : 20.6. Writing a Tape Drive on a Remote Machine
write command (ex) : 33.4. Useful ex Commands
write permission : 22.2. Tutorial on File and Directory Permissions
  absence of : (see read-only files)
  modifying without : 22.11. A Loophole: Modifying Files Without Write Access
  sticky bit and : 22.6. Protecting Files with the Sticky Bit
write utility : 1.33. UNIX Networking and Communications
writing
  13.12. Writing to Multiple Terminals for Demonstrations
  (see also output)
ww function : 29.8. Find a a Doubled Word
WYSIWYG programs : 43.12.4. WYSIWYG Document Processors

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