Delete 40 lines after every 24 lines from a file


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Delete 40 lines after every 24 lines from a file
# 1  
Delete 40 lines after every 24 lines from a file

Hello,

I have file of more than 10000 lines.

I want to delete 40 lines after every 20 lines.

e.g from a huge file, i want to delete line no from 34 - 74, then 94 - 134 etc and so on.

Please let me know how i can do it.

Best regards,
# 2  
The first deletion would start from line no 21 as per the logic !?
Or I misunderstood something? Please explain if possible with example.
# 3  
What about the first 14 lines? And is it 20 or 24 lines (see thread header)? And, 34 - 74 will be deleting 41 lines. Please improve your specification.
# 4  
First 14 lines has to be deleted. Actually no.s quoted by me can vary. As an e.g we can take that i want to print lines no 34-74 then 94-134 then 154 -174 and so on.

i.e. i want to print fixed length of lines (here 21) every time after deleting fixed length of lines (here 39)...

Hope i am able to clarify.
# 5  
Delete lines 34-74 then 94-134 then 154 -174 and so on, you mean? And first 14 lines?
Then 15-33 would remain and 75-93 and 135-153, i.e. 19 lines every time...
Try:
Code:
awk '!((NR-s)%m),!((NR-s-p+1)%m)' s=15 m=60 p=19 file

You get the idea. I used parameters so you can twiddle the knobs..

Last edited by Scrutinizer; 02-04-2014 at 03:32 AM..
# 6  
Can you please describe how it is working?
# 7  
Does it work for you?
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #319
Difficulty: Medium
The open source program Redis is a relational database server.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Delete multiple lines between blank lines containing two patterns

Hi all, I'm looking for a way (sed or awk) to delete multiple lines between blank lines containing two patterns ex: user: alpha parameter_1 = 15 parameter_2 = 1 parameter_3 = 0 user: alpha parameter_1 = 15 parameter_2 = 1 parameter_3 = 0 user: alpha parameter_1 = 16... (3 Replies)
Discussion started by: ce9888
3 Replies

2. Shell Programming and Scripting

Sed/awk to delete single lines that aren't touching other lines

Hello, I'm trying to figure out how to use sed or awk to delete single lines in a file. By single, I mean lines that are not touching any other lines (just one line with white space above and below). Example: one two three four five six seven eight I want it to look like: (6 Replies)
Discussion started by: slimjbe
6 Replies

3. Shell Programming and Scripting

search and replace, when found, delete multiple lines, add new set of lines?

hey guys, I tried searching but most 'search and replace' questions are related to one liners. Say I have a file to be replaced that has the following: $ cat testing.txt TESTING AAA BBB CCC DDD EEE FFF GGG HHH ENDTESTING This is the input file: (3 Replies)
Discussion started by: DeuceLee
3 Replies

4. UNIX for Advanced & Expert Users

In a huge file, Delete duplicate lines leaving unique lines

Hi All, I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space. I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
Discussion started by: krishnix
16 Replies

5. Shell Programming and Scripting

need to delete all lines from a group of files except the 1st 2 lines

Hello, I have a group of text files with many lines in each file. I need to delete all the lines in each and only leave 2 lines in each file. (3 Replies)
Discussion started by: script_op2a
3 Replies

6. UNIX for Dummies Questions & Answers

How get only required lines & delete the rest of the lines in file

Hiiii I have a file which contains huge data as a.dat: PDE 1990 1 9 18 51 28.90 24.7500 95.2800 118.0 6.1 0.0 BURMA event name: 010990D time shift: 7.3000 half duration: 5.0000 latitude: 24.4200 longitude: 94.9500 depth: 129.6000 Mrr: ... (7 Replies)
Discussion started by: reva
7 Replies

7. 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

8. Shell Programming and Scripting

How to delete lines in a file that have duplicates or derive the lines that aper once

Input: a b b c d d I need: a c I know how to get this (the lines that have duplicates) : b d sort file | uniq -d But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem. (3 Replies)
Discussion started by: necroman08
3 Replies

9. Shell Programming and Scripting

Grep and delete lines except the lines with strings

Hi I am writing a script which should read a file and search for certain strings 'approved' or 'removed' and retain only those lines that contain the above strings. Ex: file name 'test' test: approved package waiting for approval package disapproved package removed package approved... (14 Replies)
Discussion started by: vj8436
14 Replies

10. Shell Programming and Scripting

How to delete first 5 lines and last five lines in all text files

Hi I want to delete first five and last five lines in text files without opening the file and also i want to keep the same file name for all the files. Thanks in advance!!! Ragav (10 Replies)
Discussion started by: ragavendran31
10 Replies

Featured Tech Videos