GenWikiLinux

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(Create shortcuts in Linux (symbolic links))
 
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== GREP ==
 
== GREP ==
  grep [OPTIONS] "foo" [FILES(s)]
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  grep [OPTIONS] "REGEXP" [FILES(s)]
  
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*"REGEXP" can be any [[Regular Expression]]
 
*Single or double quotes can be used.
 
*Single or double quotes can be used.
*Quotes can be omitted if there are no spaces in the search term.  
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*Quotes can be omitted if there are no spaces in the search term.
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*If file is omitted, all files in current dir are searched.
 
*If file is omitted, all files in current dir are searched.
 
*Multiple files can be specified separated by spaces or wildcarded (*.txt)
 
*Multiple files can be specified separated by spaces or wildcarded (*.txt)
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  OPTIONS:
 
  OPTIONS:
 
  -i  ignore case
 
  -i  ignore case
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-r  recursive files inclusion
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-F  Fast search using literal search term, not regEx
 
  -n  print line #s
 
  -n  print line #s
 
  -l  just show filenames
 
  -l  just show filenames
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  -m, --max-count=NUM      stop after NUM matches
 
  -m, --max-count=NUM      stop after NUM matches
 
  -a  text files only
 
  -a  text files only
  -r recursive files inclusion
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  -iFr ignore case, simple string search, search current directory and subdirectories
  
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'''egrep''' is replaced with '''grep -E''')
 +
'''fgrep''' is replaced with '''grep -F''')
  
"foo" can be any [[Regular Expression]]
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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"
  
egrep supports pipes ("or") (= grep -E)
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==Create shortcuts in Linux (symbolic links)==
  
  egrep "fruit|bread"
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  ln -s /pathToTarget nameOfTheLink
 
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fgrep (fast grep, simple text, no RegEXp) (- grep -F)
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e.g.  ln -s /var/www/html/public_html/ webDirectory
 
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ln creates hard and soft links. The -s option create soft (symbolic) links to resources in other directories, even other drives.
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"
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Latest revision as of 13:28, 12 September 2015

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