counting a list of string in a list of txt files Post: 302225006

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Top Forums UNIX for Dummies Questions & Answers counting a list of string in a list of txt files Post 302225006 by drl on Thursday 14th of August 2008 10:16:10 AM

08-14-2008

Registered User

Hi.

Most versions of grep can handle a file of patterns, so that standard *nix utlities can be used:

Code:

#!/bin/bash -

# @(#) s3       Demonstrate string count total from files.

echo
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version =o $(_eat $0 $1) grep sort uniq
set -o nounset
echo

echo " strings file:"
cat strings

echo
echo " data files" data* ":"
cat -n data*

echo
echo " Results:"
grep -h -f strings data* |
sort |
uniq -c

exit 0

Producing:

Code:

% ./s3

(Versions displayed with local utility "version")
Linux 2.6.11-x1
GNU bash 2.05b.0
grep (GNU grep) 2.5.1
sort (coreutils) 5.2.1
uniq (coreutils) 5.2.1

 strings file:
dog
horse
cat

 data files data1 data2 data3 data4 :
     1  File 1
     2  monkey
     3  cat
     4  dog
     5  dog
     6  File 2
     7  horse
     8  sawhorse
     9  Files 3
    10  cat
    11  horse
    12  witch
    13  seven
    14  File 4
    15  spider
    16  hoarse
    17  horse
    18  horse
    19  horse
    20  cat

 Results:
      3 cat
      2 dog
      5 horse
      1 sawhorse

The files are filtered for the lines that contain strings of interest. Then, in order to count with uniq, we need to sort the result.

If you need better filtering, you may need to change the patterns in the strings file, or -- in some versions of grep -- use the "word" option "-w".

Adjust as necessary for your environment according to your man pages ... cheers, drl

drl

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