How to find multiple strings into multiple files ?

moicpit · 03-22-2010, 05:51 AM

Hi !

I would like to find all the files that contains the strings I'm searching.

For example (it's just an example), I would like to search all the files in "/etc" that contains "eth0" and "us", whatever where are located those 2 strings, the important is that the 2 strings are in the files listed.

It would be something like a "grep -lr 'eth0' *" and "grep -lr 'us' *" but in one time/command, so that I don't have to make a comparison of the 2 list of files resulting from the 2 "grep" commands given higher.

Thank you !

Pit

troop · 03-22-2010, 06:12 AM

try

Code:

egrep -lr 'eth.*us|us.*eth' *

moicpit · 03-22-2010, 07:20 AM

Thank you but it seems that it works just like the command following :

Quote:

grep -r "eth" * | grep "us"

Unfortunately, I don't want to search the files that have a line with "eth" and "us" but the files that have "eth" and "us" in it, whatever where the occurrences are.

Thank you again but it's not what I'm looking for.

I add that no matter if the solution is a BASH script. ;-)

mario.almeida · 03-22-2010, 01:02 PM

Hi,

Have you tried by reversing your search

egrep -l -v '(eth|us)' * | xargs egrep '(eth|us)'

Kenhelm · 03-22-2010, 05:21 PM

This uses 'grep -Z' with 'xargs -0' so that it can work with file names containing spaces.

Code:

grep -lZr 'eth0' * | xargs -0 grep -l 'us'

moicpit · 03-23-2010, 03:32 AM

Thank you mario, this seems to work but Kenhelm's one is better : it does exactly what I want !

So thank you Kenhelm !

Is it possible to extend your solution in order to make a search on more than 2 strings ?

Thank you again !
Pit

Kenhelm · 03-23-2010, 07:32 AM

To search for more than two strings insert
| xargs -0 grep -lZ 'str'
into the middle of the pipeline for each extra string.
This is for three strings

Code:

grep -lZr 'eth0' * | xargs -0 grep -lZ 'str' | xargs -0 grep -l 'us'

moicpit · 03-23-2010, 08:26 AM

... And if I understand well, this is for 4 strings :

Code:

grep -lZr 'str1' * | xargs -0 grep -lZ 'str2' | xargs -0 grep -lZ 'str3' | xargs -0 grep -l 'str4'

Thank you very much !

moicpit · 04-22-2010, 04:18 AM

Hi !

I would like to search for files that have lines with 'eth0' but not 'eth1' in it.

Example :
Here is 3 files :
file1.txt :

Code:

line with eth0 and eth1
line with only eth0

file2.txt:

Code:

line with eth0 and eth1

file3.txt :

Code:

line with only eth0

Do you know what command can give me the following result :

Code:

file1.txt
file3.txt

Thanks !

-Pit

Kenhelm · 04-23-2010, 11:05 PM

Try

Code:

for file in file1 file2 file3;do
  [ "$(sed -n '/eth0/{/eth1/! {=;q}}' "$file")" ] && echo "$file"
done

-n Suppresses normal sed output.
/eth0/{/eth1/! At any line containing eth0 but not eth1.
= Print the line number.
q Quit searching the file.

sed either prints a single line number or nothing, and that determines whether or not the file name is echoed.

This searches the current directory recursively.
It works with file names containing spaces.

Code:

while read file;do
  [ "$(sed -n '/eth0/{/eth1/! {=;q}}' "$file")" ] && echo "$file"
done < <(find . -type f -print)

moicpit · 04-25-2010, 11:19 AM

OK, thanks, I'll try that ! ;-)