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Old 05-11-2009, 12:50 AM   #1
vinaytp
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how to match the exact pattern using grep utility


hi all......

I am trying to match a word 'will' using grep 'will' filename then it displays lines having words like willing ..can any one help me please...I want to match exact word 'will'

Thanks in advance
 
Old 05-11-2009, 01:10 AM   #2
ghostdog74
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use the -o option
 
Old 05-11-2009, 01:11 AM   #3
penguiniator
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In general, you can get help with command-line utilities with 'command --help'. Applying this to grep, your question is answered with:
Code:
grep --help
which outputs, in part:

Quote:
Usage: grep [OPTION]... PATTERN [FILE]...
Search for PATTERN in each FILE or standard input.
PATTERN is, by default, a basic regular expression (BRE).
Example: grep -i 'hello world' menu.h main.c

Regexp selection and interpretation:
-E, --extended-regexp PATTERN is an extended regular expression (ERE)
-F, --fixed-strings PATTERN is a set of newline-separated fixed strings
-G, --basic-regexp PATTERN is a basic regular expression (BRE)
-P, --perl-regexp PATTERN is a Perl regular expression
-e, --regexp=PATTERN use PATTERN for matching
-f, --file=FILE obtain PATTERN from FILE
-i, --ignore-case ignore case distinctions
-w, --word-regexp force PATTERN to match only whole words
-x, --line-regexp force PATTERN to match only whole lines
-z, --null-data a data line ends in 0 byte, not newline
 
Old 05-11-2009, 01:36 AM   #4
syg00
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Will probably work as desired in this case, but the definition of "word" isn't necessarily what you'd expect.
 
  


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