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== GREP ==
 
== GREP ==
 
grep [options] "foo" [file(s)]
 
grep [options] "foo" [file(s)]
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 +
You can omit the quotes if there are no spaces in the search term.
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If file is omitted, all files in current dir are searched.
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Multiple files can be specified separated by spaces or wildcarded (*.txt)
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'''While most tutorials assume that you are going to specify a file to search, using the search feature in vi makes more sense for working with a single file.'''
  
 
-i  ignore case
 
-i  ignore case
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-l  just show filenames
 
-l  just show filenames
 
-x  exact matches only
 
-x  exact matches only
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-w  match whole words only
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-m, --max-count=NUM      stop after NUM matches
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-a  text files only
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-r  recursive files inclusion
  
foo can be any Regular Expression
 
  
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foo can be any [[Regular Expression]]
  
egrep supports pipes ("or")
 
  
egrep "fruit|bread"
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egrep supports pipes ("or") (= grep -E)
  
fgrep (fast grep, simple text, no RegEXp)
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egrep "fruit|bread"
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fgrep (fast grep, simple text, no RegEXp) (- grep -F)
  
 
Can pipe the output of another command
 
Can pipe the output of another command
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ls |grep blah lists all files in the current directory whose names contain the string "blah"

Revision as of 12:37, 12 September 2015

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