Visit Our UNIX and Linux User Community


Extracting m lines after n lines after match


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Extracting m lines after n lines after match
# 1  
Old 09-23-2009
Extracting m lines after n lines after match

Hi All,
I would like to extract from a text file m lines skipping n lines after a string occurrency. Is it possible with grep?
e.g.

qqq
ww
eee
rrr
ttt
yyy
uuu


I want to print 2 lines skipping 1 line after the string 'ww'
result would be

rrr
ttt


Thank you,
# 2  
Old 09-23-2009
With awk:

Code:
awk '/ww/{c=4} c && c-- < 3' file

# 3  
Old 09-24-2009
thank you
 

Previous Thread | Next Thread
Test Your Knowledge in Computers #108
Difficulty: Easy
The outer layers of the Linux architecture has the shell, shell commands and application programs.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk to combine lines if fields match in lines

In the awk below, what I am attempting to do is check each line in the tab-delimeted input, which has ~20 lines in it, for a keyword SVTYPE=Fusion. If the keyword is found I am splitting $3 using the . (dot) and reading the portion before and after the dot in an array a. If it does have that... (12 Replies)
Discussion started by: cmccabe
12 Replies

2. Shell Programming and Scripting

Removing multiple lines from input file, if multiple lines match a pattern.

GM, I have an issue at work, which requires a simple solution. But, after multiple attempts, I have not been able to hit on the code needed. I am assuming that sed, awk or even perl could do what I need. I have an application that adds extra blank page feeds, for multiple reports, when... (7 Replies)
Discussion started by: jxfish2
7 Replies

3. UNIX for Dummies Questions & Answers

awk - (URGENT!) Print lines sort and move lines if match found

URGENT HELP IS NEEDED!! I am looking to move matching lines (01 - 07) from File1 and 77 tab the matching string from File2, to File3.txt. I am almost done but - Currently, script is not printing lines to File3.txt in order. - Also the matching lines are not moving out of File1.txt ... (1 Reply)
Discussion started by: High-T
1 Replies

4. UNIX for Dummies Questions & Answers

awk display the match and 2 lines after the match is found.

Hello, can someone help me how to find a word and 2 lines after it and then send the output to another file. For example, here is myfile1.txt. I want to search for "Error" and 2 lines below it and send it to myfile2.txt I tried with grep -A but it's not supported on my system. I tried with awk,... (4 Replies)
Discussion started by: eurouno
4 Replies

5. Shell Programming and Scripting

Extracting specific lines of data from a file and related lines of data based on a grep value range?

Hi, I have one file, say file 1, that has data like below where 19900107 is the date, 19900107 12 144 129 0.7380047 19900108 12 168 129 0.3149017 19900109 12 192 129 3.2766666E-02 ... (3 Replies)
Discussion started by: Wynner
3 Replies

6. Shell Programming and Scripting

BASH: extracting values from multiple lines after a match

Hi there, I have the following output, # raidctl -l RAID Volume RAID RAID Disk Volume Type Status Disk Status ------------------------------------------------------ c0t1d0 IM OK c0t1d0 OK ... (4 Replies)
Discussion started by: rethink
4 Replies

7. Shell Programming and Scripting

Extracting N lines match number X of a pattern

Hi All, as the title says I need to extract N lines after match number X of a pattern. e.g. 111 xxx xxx 111 yyy yyy 111 www www 111 zzz zzz I would like to extract the two lines after the second 111 occurrence. I tried with grep but I didn't find any options to do that. Any... (11 Replies)
Discussion started by: f_o_555
11 Replies

8. Shell Programming and Scripting

sed problem - delete all lines until a match on 2 lines

First of all, I know this can be more eassily done with perl or other scripting languages but, that's not the issue. I need this in sed. (or wander if it's possible ) I got a file (trace file to recreate the control file from oracle for the dba boys) which contains some lines another line... (11 Replies)
Discussion started by: plelie2
11 Replies

9. Shell Programming and Scripting

help extracting a matching pattern and next lines of match

Hi there, i'm having some problems just making an awk script (i've tried this way, but other way can be posible for sure), for the next file file.txt <register> <createProfile> <result>0</result> <description><!]></description> <msisdn>34661461174</msisdn> <inputOmvID>1</inputOmvID>... (6 Replies)
Discussion started by: vicious
6 Replies

10. UNIX for Dummies Questions & Answers

Extracting lines that match string at certain position

I have a fixed length file in the following format <date><product_code><other data> The file size is huge and I have to extract only the lines that match a certain product code which is of 2 bytes length. I cannot use normal grep since that may give undesirable results. When I search for prod... (5 Replies)
Discussion started by: paruthiveeran
5 Replies

Featured Tech Videos