Linux Shells by Example

6.2. Review

6.2.1. Equality Testing

%  cat datafile
						northwest     NW    Joel   Craig   3.0   .98   3   4
						western       WE    Sharon Kelly   5.3   .97   5   23
						southwest     SW    Chris Foster   2.7   .8    2   18
						southern      SO    May Chin       5.1   .95   4   15
						southeast     SE    Derek Johnson  4.0   .7    4   17
						eastern       EA    Susan Beal     4.4   .84   5   20
						northeast     NE    TJ Nichols     5.1   .94   3   13
						north         NO    Val Shultz     4.5   .89   5   9
						central       CT    Sheri Watson   5.7   .94   5   13
					

Example 6.9.

% awk '$7 == 5' datafile western WE Sharon Kelly 5.3 .97 5 23 eastern EA Susan Beal 4.4 .84 5 20 north NO Val Shultz 4.5 .89 5 9 central CT Sheri Watson 5.7 .94 5 13

Explanation

If the seventh field ($7) is equal to the number 5, the record is printed.

Example 6.10.

% awk '$2 == "CT" {print $1, $2}' datafile central CT

Explanation

If the second field ...