CODEWITHSUNDEEP
grep
user1776907
user1776907

Reputation: 25

How can I send grep results into a different output file for each input file?

I have a folder that contains text files. I need to extract lines that has 'BA' from these text files . I used grep command to print the lines with BA. I would like to save the outputs to another folder with the same file names. How can I change the following code?

grep "  BA  "  dir/*.txt

Upvotes: 1

Views: 1915

Answers (2)

Thor
Thor

Reputation: 47099

Sounds like a job for GNU parallel:

parallel --dry-run grep '"  BA  "' '{} > otherdir/{/}' ::: dir/{a,b,c}.txt

Output:

grep "  BA  " dir/a.txt > otherdir/a.txt
grep "  BA  " dir/b.txt > otherdir/b.txt
grep "  BA  " dir/c.txt > otherdir/c.txt

Remove --dry-run when you're happy with what you see.

{} is replaced by the inputs after ::: (these can also come from stdin or a file), {/} is the basename of {}.

Upvotes: 1

Brian Agnew
Brian Agnew

Reputation: 272297

for i in dir/*.txt; do
   grep "  BA  " $i > $newdir/`basename $i`
done

Note the use of basename, which takes dir/a.txt (say) and returns a.txt

Upvotes: 2

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