Random shuffle of lines of a TXT file Post: 302824901

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1. Shell Programming and Scripting

Moving lines within a txt file

A newbie to shell scripting..... I need some assistance in doing the following: I have a system generated text file(a makefile basically). Before I can execute the make command, I need to modify one section of this generated file. The generated section is as follows: # INCLUDE macro...

2. Shell Programming and Scripting

print all even lines of a txt file

In other news, I have a colors text file with hundreds of lines, and I want to print only the even numbered lines. for example I have this file looks something like this: ALLCOLORS.TXT red red green red blue red red red green red red blue green green green blue blue blue red blue blue blue...

3. Shell Programming and Scripting

Random lines selection form a file.

>cat data.dat 0001 Robbert 0002 Nick 0003 Mark ....... 1000 Jarek

4. Shell Programming and Scripting

Deleting lines that contain spaces in a txt file

I need some help deleting lines in a file that contain spaces. Im sure awk or sed will work but i dont know much about those commands. Any help is appreciated :D

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sed to cp lines x->y from 1.txt into lines a->b in file2.txt

I have one base file, and multiple target files-- each have uniform line structure so no need to use grep to find things-- can just define sections by line number. My question is quite simple-- can I use sed to copy a defined block of lines (say lines 5-10) from filename1.txt to overwrite an...

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merging two .txt files by alternating x lines from file 1 and y lines from file2

Hi everyone, I have two files (A and B) and want to combine them to one by always taking 10 rows from file A and subsequently 6 lines from file B. This process shall be repeated 40 times (file A = 400 lines; file B = 240 lines). Does anybody have an idea how to do that using perl, awk or sed?...

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find lines in file1.txt not found in file2.txt memory problem

I have a diff command that does what I want but when comparing large text/log files, it uses up all the memory I have (sometimes over 8gig of memory) diff file1.txt file2.txt | grep '^<'| awk '{$1="";print $0}' | sed 's/^ *//' Is there a better more efficient way to find the lines in one file...

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Parse large file on line count (random lines)

I have a file that needs to be parsed into multiple files every time there line contains a number 1. the problem i face is the lines are random and the file size is random. an example is that on line 4, 65, 187, 202 & 209 are number 1's so there has to be file breaks between all those to create 4...

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how to generate random number as as the first column of a txt file

Dear all, I have a question. I have a txt file say 4000 rows X 1800 Column. I 'd like to creat a new column as the first column which is a column of random numbers (n=4000) thanks a lot! Lin

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Getting lines from .txt file

Hi I have a file with contents: NAMES John carrey williams How can I get all the names and store them in seperate variables(or arrays) please keep in mind that the no. of such names is not known.Three here is a bogus value ~thanks

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1. Shell Programming and Scripting

Moving lines within a txt file

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print all even lines of a txt file

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sed to cp lines x->y from 1.txt into lines a->b in file2.txt

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find lines in file1.txt not found in file2.txt memory problem

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Parse large file on line count (random lines)

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how to generate random number as as the first column of a txt file

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Getting lines from .txt file

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