Sponsored Content
Top Forums Shell Programming and Scripting Deleting lines from file using another file Post 302497403 by apmcd47 on Thursday 17th of February 2011 05:30:07 AM
Old 02-17-2011
Either:
Code:
fgrep -v -f b.txt a.txt > target1
fgrep -v -f a.txt b.txt > target2

Or:
Code:
< a.txt b.txt b.txt sort | uniq -u > target1
< a.txt a.txt b.txt sort | uniq -u > target2

Andrew
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Deleting specific lines in a file

I have a file which has some lines starting with a particular word. I would like to delete 5 lines before each such line containing that particular word. eg: line1 line2 line3 line4 line5 line6 "particular word"... I would like to delete line2-line6 and all such occurences in that... (4 Replies)
Discussion started by: ramu_1980
4 Replies

2. Shell Programming and Scripting

Deleting last 2 lines from the file.

Hi I have a file & always I need to remove or delete last 2 lines from that file. So in a file if I have 10 lines then it should return me first 8 lines. Can someone help me? (4 Replies)
Discussion started by: videsh77
4 Replies

3. Shell Programming and Scripting

Deleting lines in a file

How do I delete all the lines after the line containing text ***DISCLOSURES*** . I want to delete this line too. Thank you (2 Replies)
Discussion started by: reachsamir
2 Replies

4. Shell Programming and Scripting

Deleting lines inside a file without opening the file

Hi, Just consider there are around 10 lines in a file. Now is it possible to delete the first 2 lines in the file without opening the file. No matter whatever the content of the file is, I just wanna delete the first 2 lines without opening the file. Is that possible? If so, please help me out.... (3 Replies)
Discussion started by: toms
3 Replies

5. UNIX for Dummies Questions & Answers

Deleting whole lines from a file

I have a file with 65 sets of 35 coordinates, and would like to isolate these coordinates so that I can easily copy the coordinates to another file. The problem is, I've got a 9 line header before each set of coordinates (so each set is 44 lines long). There are a zillion threads out there about... (3 Replies)
Discussion started by: red baron
3 Replies

6. Shell Programming and Scripting

Deleting lines from file using another file

I am having a requirement like File A contains All the records eg., ONE TWO THREE FOUR FIVE SIX SEVEN EIGHT NINE TEN File B contains invalid records of File A eg., TWO FOUR FIVE SEVEN (7 Replies)
Discussion started by: dinesh1985
7 Replies

7. UNIX for Advanced & Expert Users

Deleting lines from a file

How I can delete 100 lines anywhere in a file without opening a file and without renaming the file. (11 Replies)
Discussion started by: Nirgude07
11 Replies

8. Shell Programming and Scripting

Deleting lines in a flat file

Hi Friends I have a flat file which has sentence like "Notice generated". It can be anywhere in the flat file. What I want to do is, I want to delete all the lines which are above sentence "Notice generated". How can I do it. Kindly advice. Anushree (5 Replies)
Discussion started by: anushree.a
5 Replies

9. Shell Programming and Scripting

deleting lines from file

We have a server that logs transactions to a file. I want to write a script that will delete the first 50 lines of the file daily without renameing the file or moving the file. (8 Replies)
Discussion started by: daveisme
8 Replies

10. Shell Programming and Scripting

Deleting lines of a file if they exist in another file

I have a reference file that needs to remain static and another file that may or may not have duplicate rows that match the reference file. I need help with a command that will delete any duplicate rows from the second file while leaving reference file intact For example reference file would... (4 Replies)
Discussion started by: bjdamon
4 Replies
fmt(1)							      General Commands Manual							    fmt(1)

NAME
fmt - format text SYNOPSIS
width] [file...] DESCRIPTION
The command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the width option. The default width is 72. concatenates the arguments. If none are given, formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. does not fill lines beginning with a period for compatibility with Nor does it fill lines starting with Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used). can also be used as an in-line text filter for the command: reformats the text between the cursor location and the end of the paragraph. Options recognizes the following options: Crown margin mode. Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such "formatted" text, from being unduly combined. Fill output lines to up to width columns. WARNINGS
The width option is acceptable for BSD compatibility, but it may go away in future releases. SEE ALSO
nroff(1), vi(1). fmt(1)
All times are GMT -4. The time now is 02:27 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy