An excerpt from the grep man page
Quote:
--binary-files=TYPE
If the first few bytes of a file indicate that the file contains binary data, assume that the file is of
type TYPE. By default, TYPE is binary, and grep normally outputs either a one-line message saying that a
binary file matches, or no message if there is no match.
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This is the default behavior. You will only concern about searching into "all files in all directories ". You can use something like
Code:
find / -type f -print 0 | xargs -0 grep <pattern>
This will search <pattern> into all files on your system. It may take a lot of time and resources, anyway. Better to run as root in order to avoid file access permissions problems.