Drop common lines at head/tail of a large set of files

Login or Register for Dates, Times and to Reply

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Drop common lines at head/tail of a large set of files
# 1  
Drop common lines at head/tail of a large set of files

Hi! I have a large set of pairs of text files (each pair in their own subdirectory) and each pair shares head/tail (a couple of first and last lines) but differs in the middle part. I need to delete the heads/tails and keep only the middle portions in which they differ. The lengths of heads/tails are not the same (in terms of number of lines) for different pairs. Do you know an easy way to delete all the heads (tails) at once for all the files? Thanks a lot in advance!
# 2  
At least you have to know how many lines or to recognize what lines to remove.

What have you tried so far?

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 #949
Difficulty: Medium
In computer security, term virus and malware refer to the exact same thing.
True or False?

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Find common numbers from two very large files using awk or the like

I've got two files that each contain a 16-digit number in positions 1-16. The first file has 63,120 entries all sorted numerically. The second file has 142,479 entries, also sorted numerically. I want to read through each file and output the entries that appear in both. So far I've had no... (13 Replies)
Discussion started by: Scottie1954
13 Replies

2. Homework & Coursework Questions

Head Tail Problem

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: view the 7th line of the program xxx.sh 2. Relevant commands, code, scripts, algorithms: head command tail... (10 Replies)
Discussion started by: hbell221
10 Replies

3. UNIX for Dummies Questions & Answers

head\tail how to display middle lines

hay i need to display middle line: 1 2 3 4 5 how can i display 3-4? (6 Replies)
Discussion started by: margan_ron
6 Replies

4. UNIX for Advanced & Expert Users

Find common Strings in two large files

Hi , I have a text file in the format DB2: DB2: WB: WB: WB: WB: and a second text file of the format Time=00:00:00.473 Time=00:00:00.436 Time=00:00:00.016 Time=00:00:00.027 Time=00:00:00.471 Time=00:00:00.436 the last string in both the text files is of the... (4 Replies)
Discussion started by: kanthrajgowda
4 Replies

5. UNIX for Dummies Questions & Answers

Display lines 30 to 40 of a text file using head and/or tail commands

Assume that the text file contains over 40 lines. How do you do this?!?!? (5 Replies)
Discussion started by: phunkypants
5 Replies

6. Shell Programming and Scripting

search of common words in set of files

Hi, I have a set of simple, one columned text files (in thousands). file1: a b c d file 2: b c d e and so on. There is a collection of words in another file: b d b c d e I have to find out the set of words (in each row) is present or absent in the given set of files. So, the... (4 Replies)
Discussion started by: mala
4 Replies

7. Shell Programming and Scripting

Head and Tail in One Line

I am new to UNIX......I have one file which contains thousnads of records with header and tailer. Header Record 1 Record 2 .... .... Last Record Trailer I want to concatenate Header and Trailer in the first line....now the output should look like this: Header: Header value, Trailer:... (2 Replies)
Discussion started by: 33junaid
2 Replies

8. UNIX for Dummies Questions & Answers

head & tail

I've a major file which includes other files and now I wanna 'cut' the file in several minor parts....like .... find / -name "*.tmp" >filea wc -l filea >fileb sed -e '1s/ filea//' fileb >filec AMOUNT=`cat filec` if ; then cat file a |head -100l (ell) |tail -100l >filec cat file a |head... (6 Replies)
Discussion started by: svennie
6 Replies

9. Shell Programming and Scripting

Implementing MORE,HEAD & TAIL

hai in my shell script i want to replace the following commands 1) more 2) head 3) tail i want to try all type of possible options avaliabul in the above commands please help in implementing those commands (9 Replies)
Discussion started by: g_s_r_c
9 Replies

Featured Tech Videos