grep question

keyops · 04-09-2004, 07:49 PM

Hi

Trying to grep a 2 gig file for email addresses.

Have looked at using

grep ".*\@[^ ]*[a-zA-Z0-9\-]*\.[a-zA-Z0-9\-]*" <file>

but its not efficient. Can anyone help me on this? I also need to try and use sed or something to only display/copy out the email addresses themselves, not the junk either side. The file is basically a disk image, I used dd to dump it.

Its my old ntfs vol which freaked out big time and I am working in Linux...good learning exercise!

K

slakmagik · 04-09-2004, 08:32 PM

Depends on the format and I'm not sure what would count as efficient - or how precise you need to be. This

Code:

grep '.*@.*\..*' html/bookmarks.html | sed 's/^.*mailto://g;s/\".*$//g'

pulls email addresses out of a bookmarks file (not that most people have them there, but just for the idea).

Why did you dump an NTFS volume into a disk image with dd? Or do I not want to know?

strikeforce · 04-09-2004, 09:17 PM

create a sed statement searching for that string the most efficient I've seen is to actually use sed and grep together.