UNIX file utilities:

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UNIX file utilities

• find wc wildcards

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Review of Past Commands

• echo
• Useful for producing diagnostics in command files
• For sending known data into a pipe
• For displaying the contents of environment
  variables
• echo
• echo /

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• cat
• Use to send output to the screen or to Display
  file contents.
• Use to join files
• lt gt redirect
• gtgt append

4
find

• The find command searches for files (not within
  files).
• Syntax
• find location options name, type, time
• . current directory
• /poems/ poems directory within current directory
• ../ current directory and up one level

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Finding files

• Use the find command when you cant remember
  where you put that file-name is the most common
  option
• Default path is the current directory
• Default expression is -print

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Finding files and programs

• Syntax in current directory
• find . name lostfile -print
• Syntax in a specific directory
• find public_html/ -name lostfile print
• Syntax for multiple directories
• find public_html/inls102 public_html/exercises
  -name lostfile print
• Find by Date find directory ctime daysold
  -print
• find / ctime 1 print

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• Hints
• You do not have to include the print flag on
  ruby or isis
• You can use quoted wildcards to find a file with
  a partially unknown titlefind . inls print

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File information

• Count the number of words
• wc
• Sort a file
• sort
• Split a file into different parts
• split
• Compare two files together
• diff

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wc

• wc stands for "word count". It counts the number
  of characters, words, and lines that are
  contained in a specified file or files.
• Wc with no options prints the following counts
  for a file

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wc

• Options
• -c character count.
• -l line count.
• -w word count.
• Examples
• Count the number of words in a filewc w
  file.txt
• Count the number of lines in a file wc l
  file.txt
• Count the words in three essay fileswc -w
  test12345.txt or wc -w test1-5.txt
• Count the number of users logged inwho wc -l

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Questions?