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count's Introduction

count : count fields in text files

This is a unix commandline filter handy for summarising quick greps in logs.

For example: grep stuff /path/to/apache/combined/log | count FIELD-NUMBER

such as wondering who is causing all the 404s?

$ grep ' 404 ' /path/to/apache/combined.log | count 0
Summary for field 0

11.80.43.243   4  50.00%
22.85.35.198   1  12.50%
33.6.17.183    1  12.50%
44.246.146.130 1  12.50%
55.249.67.57   1  12.50%
-------------- - -------
	   8 100.00%

and you can also get a quicker visual histogram:

$ grep ' 404 ' /path/to/apache/combined.log | count --histogram 0
Summary for field 0

11.80.43.243   4  50.00% ##############################
22.85.35.198   1  12.50% #######
33.6.17.183    1  12.50% #######
44.246.146.130 1  12.50% #######
55.249.67.57   1  12.50% #######
-------------- - -------
	   8 100.00% ############################################################

Dave Beckett

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