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Find string in file and find the all records by string

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# 1  
Old 06-23-2015
Find string in file and find the all records by string
Hello

I would like to get know how to do this:
I got a big file (about 1GB) and I need to find a string (for instance by grep )
and then find all records in this file based on a string.

Thanks for advice.

Martin
# 2  
Old 06-23-2015
What is the record separator?
Does the string need to be in a specific position in order for the record to be "based" on it?
under normal circumstances grep $STRING $FILE will return each line containing the string, which may be all you need.
# 3  
Old 06-23-2015
Is this a homework assignment?

How are the strings passed to your script?

What files are you trying to process?

What have you tried to solve this on your own?
# 4  
Old 06-23-2015
I need to find string like ABCD
PHP Code:
grep ABCD $FILE 
This grep gives me some records where is another string for instance BABA
and I need to find all records by BABA on $FILE

---------- Post updated at 02:21 AM ---------- Previous update was at 02:17 AM ----------

Just first its easy to find ABCD using by GREP ABCD $FILE

But the next step I dont know exactly how to write this.
# 5  
Old 06-23-2015
Hi Martin,

you can find multiple patterns using egrep
like
Code:
egrep 'string1|string2' $FILE

thanks

venkat
# 6  
Old 06-23-2015
I just know the first string1 what I would like to use, but the second string2 not.
So its must be stored somewhere and then use grep on string2
# 7  
Old 06-23-2015
Hi

sorry if i misunderstood,

what are you going to store string2?

Thanks
venkat
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