Shell Programming and Scripting

Hi Guys

I am checking the treads to get the answer but i am not able to get the answer for my question.

I have two files. First file is a pattern file and the second file is the file i want to search in it. Output will be the lines from file2.
File1:

Code:

P2797f12af                    44751228
P2b1204d0f                    33470964
P2b1205f76                    35815429
P2797f0250                    8219027

File 2:

Code:

P2797ea6c0                    1942611  SAN   SAN
P2797f12af                    44751228 SAN   SAN
P2b1204d0f                    33470964 SAN   SAN
P2b1205f76                    35815429 SAN   SAN
P2797f0250                    8219027  SAN   SAN

Output:

Code:

P2797f12af                    44751228 SAN   SAN
P2b1204d0f                    33470964 SAN   SAN
P2b1205f76                    35815429 SAN   SAN
P2797f0250                    8219027  SAN   SAN

I am able to do this using below command:

Code:

fgrep -f file1 file2

But it is giving me an error of out or memory as my file size is more than 1 million.
I also tried splitting it:

Code:

split -l 10000 file1 file1.split.
for CHUNK in file1.split.* ; do
        fgrep -f "$CHUNK" file2
done
rm file1.split.*

It is also taking a lot of time. First loop is done really quick but for the next loop to start it is taking long time.

Can you please let me know if i am doing something wrong here. Or can you please provide me any awk command to do this stuff.

You guys are great... looking forward for your reply.

Ooops

---------- Post updated at 03:02 PM ---------- Previous update was at 02:58 PM ----------

what is your file size ?

Fgrep not working as files are huge.
Getting below error:
fgrep: not enough memory.

What are the size of your file1 and file2 ?

both file will be containing around 400,000 lines.

Could you please provide their size ? (not their number of lines)

file1: 99417680
file2: 20430220
In bytes
File 2 may also be larger that the file 1.