Korn Shell Programming by Example

grep

Official Description

Searches a file for patterns.

Syntax

grep [-E  | -F] [-c  | -l  | -q] [-bhinsvwxy]
[-pparagraph_separator] –e pattern_list [-e pattern_list]...
[-f pattern_file]... [file...]

Options

-E functions as an egrep command.

-F functions as an fgrep command.

-c shows a count of matching lines.

-i ignores case.

-l lists filenames.

-v inverts the meaning of the search.

Oddities

The grep command looks to stdin for the data through which to search.

Example

 $ cat buzz #! /bin/ksh integer x=17 while : do x=17 done $ $ cat buzz | grep 17 # Looks through piped data for 17 integer x=17 x=17 $ ls | grep buzz # Looks through piped data for buzz buzz buzz1 buzz2 buzz3 buzz4 $ ls | grep 17 # Looks through piped data for 17, not there $ $ ...