grep Unix Utility

A grep Unix Utility is a Unix utility for the search through text task to identify lines that match a text-based regular expression.

• Example(s):
  • grep -ve 'patternA' -ve 'patternB' file.txt
  • grep --with-filename --only-matching 'pattern' file.txt
• Counter-Example(s):
  • awk Unix Utility.
  • sort Unix Utility.
  • find Unix Utility.
  • paste Unix Utility.
• See: File Processing, Search System.

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References

• http://www.thegeekstuff.com/2009/03/15-practical-unix-grep-command-examples/

2011

• http://en.wikipedia.org/wiki/Grep
  • grep is a command-line text-search utility originally written for Unix. The name comes from the ed command g/re/p (global / regular expression / print). The grep command searches files or standard input globally for lines matching a given regular expression, and prints the lines to the program's standard output.

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