Learning Unix for OS X Mountain Lion by Dave Taylor
Author:Dave Taylor [Dave Taylor]
Language: eng
Format: epub, pdf
Tags: COMPUTERS / Operating Systems / Macintosh
ISBN: 9781449332266
Publisher: O'Reilly Media
Published: 2012-09-18T16:00:00+00:00
Counting matches rather than showing matching lines
When you’re going through a large file and have a lot of matches, it’s often quite useful to just get a report of how many lines matched rather than having all the output stream past on your screen. This is accomplished with the -c option:
$ grep -c "kernel" /var/log/system.log 160
You can also accomplish this result by piping the output to the wc command, as shown in Chapter 6, but this is considerably faster!
Working with Regular Expressions
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