Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

search for the matched pattern by tracing back from the line

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting search for the matched pattern by tracing back from the line
# 1  
Old 07-31-2008
search for the matched pattern by tracing back from the line
Hi,

I want to grep the line which has 'data11'.then from that line, i need to trace back and find out the immediate line which has the same timestamp of that grepped line.
for eg:
log file:
-----------
[22/Jan/2008:19:37:00-20401-59-2] Process - data
[22/Jan/2008:19:37:00-20401-59-2] Process - datavalue - 2345
[22/Mar/2008:19:37:00-20401-63-2] Process - data
[01/Jul/2008:19:37:00-20401-63-2] Process - data
[22/Jul/2008:19:37:00-20401-63-2] Process - data
[22/Jan/2008:19:37:00-20401-59-2] Process - data11

so here ,first i will grep for 'data11' and i will get the line number as 6.Then from the line6 ,i have to trace back and find out the immediate line which has the same timestamp.here it is [22/Jan/2008:19:37:00-20401-59-2].so the result line is 2.How to get this using grep?
# 2  
Old 07-31-2008
1. find your desired timestamp
2. find all the lines contain that timestamp
3. get the second last one


Code:
temp=`cat file | grep data11 | nawk '{sub(/\[/,"",$1);sub(/\]/,"",$1);print $1}'`
cat a | grep $temp > file.t
tail -2 file.t | head -1

# 3  
Old 07-31-2008
You can avoid the use of temporary files, Useless Use of Cat, and Useless Use of Grep | Awk:

Code:
grep `nawk '/data11/{sub ...}' file` a | tail -2 | head -1

For extra points, modify the awk script so it prints out a sed script which does the right thing.
# 4  
Old 07-31-2008
cleaner to do this:

Code:
#  awk '/data11/{print c[$1]};{c[$1]=$0}' file1
[22/Jan/2008:19:37:00-20401-59-2] Process - datavalue - 2345

otherwise you're making assumptions that there are only two lines with that timestamp....
# 5  
Old 07-31-2008
I am doing some grep operation and some other operations and finding this lineno.From this line I want to go back and find the immediate matched line with that timestamp.
# 6  
Old 07-31-2008
My code is like this.

for i in $(grep -n data11 file.txt|cut -d: -f1)
do
sed -n "${i},${i}p" logfile.txt|cut -d" " -f5 >> msg.txt
sed -n "${i},${i}p" logfile.txt|cut -d: -f1 >> msg.txt
sed -n "${i},${i}p" logfile.txt|cut -d: -f2,3 >> msg.txt
done


In this after do,i need to get that matched lineno.
# 7  
Old 08-01-2008
Can anyone tell me How I can get the result?
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Search a string inside a pattern matched block of a file

How to grep for searching a string within a begin and end pattern of a file. Sent from my Redmi 3S using Tapatalk (8 Replies)
Discussion started by: Baishali
8 Replies

2. Shell Programming and Scripting

Search for Pattern as output between the matched String

Hello, I have a file which has the below contents : VG_name LV_name LV_size in MB LV_option LV_mountpoint owner group y testdg rahul2lv 10 "-A y -L" /home/abc2 ... (6 Replies)
Discussion started by: rahul2662
6 Replies

3. Shell Programming and Scripting

How to print previous line of multiple pattern matched line?

Hello, I have below format log file, Comparing csv_converted_files/2201/9747.1012H67126.5077292103609547345.csv and csv_converted_files/22019/97447.1012H67126.5077292103609547345.csv Comparing csv_converted_files/2559/9447.1012H67126.5077292103609547345.csv and... (6 Replies)
Discussion started by: arvindshukla81
6 Replies

4. UNIX for Advanced & Expert Users

To print from the first line until pattern is matched

Hi I want to print the line until pattern is matched. I am using below code: sed -n '1,/pattern / p' file It is working fine for me , but its not working for exact match. sed -n '1,/^LAC$/ p' file Input: LACC FEGHRA 0 LACC FACAF 0 LACC DARA 0 LACC TALAC 0 LAC ILACTC 0... (8 Replies)
Discussion started by: Abhisrajput
8 Replies

5. Shell Programming and Scripting

Search: find current line, then search back

Hello. I want to find a line that has "new = 0" in it, then search back based on field $4 () in the current line, and find the first line that has field $4 and "last fetch" Grep or Awk preferred. Here is what the data looks like: 2013-12-12 12:10:30,117 TRACE last fetch: Thu Dec 12... (7 Replies)
Discussion started by: JimBurns
7 Replies

6. Shell Programming and Scripting

How to use sed to search a particular pattern in a file backward after a pattern is matched.?

Hi, I have two files file1.txt and file2.txt. Please see the attachments. In file2.txt (which actually is a diff output between two versions of file1.txt.), I extract the pattern corresponding to 1172c1172. Now ,In file1.txt I have to search for this pattern 1172c1172 and if found, I have to... (9 Replies)
Discussion started by: saurabh kumar
9 Replies

7. Shell Programming and Scripting

Insert certain field of matched pattern line above pattern

Hello every, I am stuck in a problem. I have file like this. I want to add the fifth field of the match pattern line above the lines starting with "# @D". The delimiter is "|" eg > # @D0.00016870300|0.05501020000|12876|12934|3||Qp||Pleistocene||"3 Qp Pleistocene"|Q # @P... (5 Replies)
Discussion started by: jyu3
5 Replies

8. Shell Programming and Scripting

Use AWK to move matched line back one?

Can somebody help me with this? I'm sure it's a no-brainer if you know awk... but I don't. Input: Blah Blah Me love you long time Blah Blah awk magic with 'long time' ==> Output: Blah Blah Me love you long time (0 Replies)
Discussion started by: Ryan.
0 Replies

9. Shell Programming and Scripting

Help required on joining one line above & below to the pattern matched string line.

Hi Experts, Help needed on joining one line above & below to the pattern matched string line. The input file, required output is mentioned below Input file ABCD DEFG5 42.0.1-63.38.31 KKKK iokl IP Connection Available ABCD DEFG5 42.0.1-63.38.31 ... (7 Replies)
Discussion started by: krao
7 Replies

10. Shell Programming and Scripting

awk script to move a line after the matched pattern line

I have the following text format in a file which lists the question first and then 5 choices after that the explanantion and finally the answer. 1.The amount of time it takes for most of a worker’s occupational knowledge and skills to become obsolete has been declining because of the... (2 Replies)
Discussion started by: nanchil_guy
2 Replies
Login or Register to Ask a Question