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How can i find a word inside a file from a directory and it's subdirectory ?

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Top Forums Shell Programming and Scripting How can i find a word inside a file from a directory and it's subdirectory ?
# 1  
Old 10-09-2011
MySQL How can i find a word inside a file from a directory and it's subdirectory ?
Suppose i have a word "mail".
I have to search this word in all files inside a directory and it's sub-directories.

It will also search in all hidden directory and sub-directories.

If it finds this word in any file it will list that file.

How can i do this with perl/ruby/awk/sed/bash or using any command ?
# 2  
Old 10-09-2011
Code:
find /directory -type f -exec grep -l mail {} \;

# 3  
Old 10-09-2011
Or the more efficient:
Code:
find /directory -type f -exec grep -l mail {} +

# 4  
Old 10-09-2011
@jlliagre , @jim mcnamara,

Is it possible to get the same result with only grep command ?

---------- Post updated at 07:11 PM ---------- Previous update was at 07:05 PM ----------

Quote:
Originally Posted by jim mcnamara
Code:
find /directory -type f -exec grep -l mail {} \;

I tried that , but it did not print any filename .

But if i do
Code:
grep -lri "mail" .

It prints some filename.

Actually what i'm trying to do is to print those filename which file content the word "mail". That means if i do
Code:
cat filename | grep mail

I will get some lines.
# 5  
Old 10-09-2011
Here's what you want:
Code:
find ./ -type f -print0 | xargs -0 grep -n "mail"

This code shows the file name and the line number where "mail" is found.
Output:
Code:
/home/unixuser/.gnupg/gpg.conf:102:# Example email keyserver:
/home/unixuser/.gnupg/gpg.conf:103:#      mailto:pgp-public-keys@keys.pgp.net
/home/unixuser/.gnupg/gpg.conf:129:#keyserver mailto:pgp-public-keys@keys.nl.pgp.net
/home/unixuser/.gnupg/gpg.conf:201:# photo-viewer "metamail -q -d -b -c %T -s 'KeyID 0x%k' -f GnuPG"

and if you want to match with just the word "mail", use this:
Code:
find ./ -type f -print0 | xargs -0 grep -n " mail "

Note the spaces before and after mail within quotes. For case-insensitive search, add -i with grep:
Code:
find ./ -type f -print0 | xargs -0 grep -in " mail "

Last edited by admin_xor; 10-09-2011 at 01:31 PM..
# 6  
Old 10-09-2011
Check if your grep supports -r option, if so you can do it this way
Code:
grep -rli mail *

--ahamed
# 7  
Old 10-09-2011
Quote:
Originally Posted by cola
I tried that , but it did not print any filename .
Hmm, that doesn't make sense. Try:
Code:
find . -type f -exec grep mail {} +

This does pretty much the same thing, just a simpler and cleaner way, as the convoluted alternative:
Code:
find ./ -type f -print0 | xargs -0 grep ...
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