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Top Forums Shell Programming and Scripting Extracting/condensing text from multiple files to multiples files Post 302520162 by born2phase on Friday 6th of May 2011 03:30:50 AM
Old 05-06-2011
Extracting/condensing text from multiple files to multiples files

Hi Everyone,

I'm really new to all this so I'm really hoping someone can help. I have a directory with ~1000 lists from which I want to extract lines from and write to new files. For simplicity lets say they are shopping lists and I want to write out the lines corresponding to apples to a new file for each list i.e. list1apples, list2apples etc. So far the best I've come up with is to use grep on each individual list:

grep Apples list1.text > list1apples.txt
grep Apples list2.text > list2apples.txt

Is there an easier way of doing this so that I can extract the required text from each document to a new one without having to modify the command for each one? As I said this is simplified example, in reality each of the lists has a completely different name given by 4 random letters and numbers.

Alternatively finding a way of deleting everything from these files apart from the desire text would also work.

Any help would be greatly appreciated!
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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