Searching for lines in textfiles


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Searching for lines in textfiles
# 1  
Old 06-17-2010
Searching for lines in textfiles

Hello all,

I've a problem. I've two logfiles and i need to find lines in the second file by using information from the first file. First I need to extract a searchpattern from the first file. Its like abc=searchpattern&cde=. All between abc= and &cde= is the pattern I need to find in the second file.

I've thought about making a tempfile with all searchpatterns and then grepping the second file with it. Is this possible? And how do i extract the patterns? I think sed is the program i need but i dont find out how.

Thanks in advance.
# 2  
Old 06-17-2010
Code:
awk 'NR==FNR{a[gensub(".*abc=(.+)\\&cde=.*","\\1",1)]++;next}{for (i in a){if($0~i){print}}}' first.file second.file


Last edited by bartus11; 06-17-2010 at 01:04 PM.. Reason: fixed regex
# 3  
Old 06-17-2010
Thanks. I'll try it tomorrow.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Searching for pattern and remove the lines

Hi , I want to remove the specific pattern and remove those lines from file using shell script. i want to remove these lines <?xml version='1.0' encoding='UTF-8'?> <row_set> </row_set> my input file has content like this. file name: sample.xml <?xml version='1.0'... (4 Replies)
Discussion started by: nukala_2
4 Replies

2. UNIX for Dummies Questions & Answers

Add lines after searching for a pattern

Hi, I have 2 files like below. File A: apple mango File B: start abc def apple ghi end start cba fed (4 Replies)
Discussion started by: jayadanabalan
4 Replies

3. Shell Programming and Scripting

Searching inverted lines

Hi fellas, I have a file like this: A_B B_D C_D D_B E_F G_H B_A F_E In other words, I have member1_member2 and member2_member1 in the same file. In the exemple aforementioned I have A_B and B_A, B_D and D_B, E_F and F_E. So, I would like to know a sript that print the lines B_A, D_B... (3 Replies)
Discussion started by: valente
3 Replies

4. Shell Programming and Scripting

Perl searching special words in lines

Hi , i am a new with perl, i want to made a script that find in file rows that start with specil words, as an example a line will start with" ............................................. specialword aaa=2 bbb=5 ............................................. and to put this in a new file... (3 Replies)
Discussion started by: alinalin
3 Replies

5. UNIX for Dummies Questions & Answers

Searching for lines in a file?

What is the best way to display lines in a log file that begin with a certain string? Preferably I would like to 'print' them to a file. I guess I would use 'cat' for that? There are two types of line I would like to get at - each begins with a different two words. It would be something... (8 Replies)
Discussion started by: Sepia
8 Replies

6. Shell Programming and Scripting

Searching for lines ending with }

I'm trying to search for lines ending with "}" with the following command but am not getting any output. grep '\}$' myFile.txt I actually want to negate this (i.e. lines not ending with "}"), but I guess that should be easier once I find the command that finds it? (11 Replies)
Discussion started by: BootComp
11 Replies

7. Shell Programming and Scripting

lines searching >>

hi guys! I`ll really appreciate your help. The situation is: i have a log file, and i need to get the needed lines from it. linecount=$(cat -n http.log | grep ALERT | awk '{print $1}' | wc -l) lines=$(cat -n http.log | grep ALERT | awk '{print $1}') 1-string gets the number of found lines... (2 Replies)
Discussion started by: neverhood
2 Replies

8. Shell Programming and Scripting

Removing uppercase words from textfiles

I have the task of removing all uppercase words from csv files, mit 10000's lines. I think it shoud be possible with regex's, something like "s/{2,}//g" but I can't get it work with sed or Vi. It would also be possible to script in ksh, awk, perl or python. example this "this is a EXAMPLE... (5 Replies)
Discussion started by: frieling
5 Replies

9. Shell Programming and Scripting

sed searching across lines

hi, i'm making now a bash script, that runs some compiler... i want to take only errors form its output eg: output: bla bla bla ... erros is 1324546 the bla bla bla bla bla bla... ... and i want to get only erros is 1324546 the bla bla bla (11 Replies)
Discussion started by: miechu
11 Replies

10. UNIX for Dummies Questions & Answers

How to replace a string in multiple textfiles?

Hello I'm trying to replace a string in multiple text files using the tcsh shell. For example I've got some files called test1 test2 test3 etc. Each of them contains "Hello World". Now I want to replace each "Hello" with "Howdy" using sed and a foreach loop. I tried the following but it... (1 Reply)
Discussion started by: dwidmer
1 Replies
Login or Register to Ask a Question