October 2001
Intermediate to advanced
1040 pages
22h 50m
English
The grep command has a number of options that control its behavior. Not all versions of UNIX support exactly the same options, so be sure to check your man pages for a complete list.
% cat datafile northwest NW Charles Main 3.0 .98 3 34 western WE Sharon Gray 53 .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
grep –n '^south' datafile 3:southwest SW Lewis Dalsass 2.7 .8 2 18 4:southern SO Suan Chin 5.1 .95 4 15 5:southeast SE Patricia Hemenway 4.0 .7 4 17 |
EXPLANATIONThe –n option precedes ... |