O'Reilly logo

Linux Shells by Example by Ellie Quigley

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

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 ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required