GREP: only for text files? What am I doing wrong?
 

I thought the command:

grep -a -i -r "Linux is" /media/hd/doc/computer/

would find the text string Linux is in all files in /media/hd/doc/computer/ and subdirectories.

But it's not! It finds Linux is only in text files. The -a switch isn't doing what I thought it would do. I know that Linux is is in several .doc and .odt files, but grep doesn't report them.

Am I doing something wrong? Using a utility for an unintended purpose? Can anyone suggest a better utility for hunting for text in .doc files?

Most likely, the string is not exactly stored in this way in a doc or odt file. Perhaps the blank is something else than an ASCII 32. You can check that with the od command or a binary editor.

The only recommendation I have is OpenOffice or LibreOffice. They might have non-GUI utilities.

Neither .doc nor .odt are text files - ergo you can't simply search them as text.
A simple online search should have informed you of this.

For odt, try unzip before the grep, for .doc look at catdoc.

First, FWIW: the search string:

grep -a -i -r "Linux" /media/hd/doc/computer/

also comes up empty. Thank you, though, berndbausch, for suggesting that the string might be stored differently; I hadn't thought of that.

This page at serverfault told me I can grep my way through binary files with the -a switch:

https://serverfault.com/questions/32...look-like-text

Did I misunderstand something? (Wouldn't be the first time ...)

I'll experiment with catdoc, syg00; thank you for this recommendation.

It looks like Recoll can do the job:

http://www.lesbonscomptes.com/recoll/