3.2. grep Examples with Regular Expressions

The file being used for these examples is called datafile.

% cat datafile
				northwest           NW   Charles Main       3.0    .98    3     34
				western             WE   Sharon Gray        5.3    .97    5     23
				southwest           SW   Lewis Dalsass      2.7    .8     2     18
				southern            SO   Suan Chin          5.1    .95    4     15
				southeast           SE   Patricia Hemenway  4.0    .7     4     17
				eastern             EA   TB Savage          4.4    .84    5     20
				northeast           NE   AM Main Jr.        5.1    .94    3     13
				north               NO   Margot Weber       4.5    .89    5      9
				central             CT   Ann Stephens       5.7    .94    5     13
Example 3.5. 
					grep NW datafile
					northwest    NW    Charles Main    3.0   .98    3    34

EXPLANATION

Prints all lines containing the regular expression NW in a file called datafile.

Example 3.6. 
					grep NW d*
					datafile: northwest  NW   Charles Main   3.0  .98  3    34
					db:northwest         NW   Joel Craig     30   40   5    123

EXPLANATION

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