Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Script to break up file (write new files) in bash
Top Forums UNIX for Dummies Questions & Answers Script to break up file (write new files) in bash Post 302898677 by torchij on Wednesday 23rd of April 2014 09:39:38 AM
Old 04-23-2014
My apologies, here are some numbers. The file I'm using has 252 "pieces" and 49,134 lines total.
I like the csplit option, its clean and gives options:
Code:
time csplit -f test_ -n3 -s segments.test.txt "/^$/" {*}
real    0m2.112s
user    0m0.106s
sys     0m0.033s

awk command 1 (had to remove the quotes around the redirect ">")
Code:
time awk 'BEGIN{FN=1} NF==0 {FN++;next} {print $0 > "file_new_TEST"FN}' segments.test.txt
real    0m0.362s
user    0m0.054s
sys     0m0.034s

awk command 2:
Code:
time awk -F "\t" '{print $0 > "file_new" NR ".txt"}' RS= segments.test.txt
real    0m0.322s
user    0m0.012s
sys     0m0.035s

Awk seems to perform better...I'm quite the computing newb, it would be interesting to understand why this might be?

Thanks for all the help.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Break a file into separate files

Hello I am facing a scenario where I have a file with XML content and I am running shell script over it. But the problem is the XML is getting updated with new services. In the below scenario, my script takes values from the xml file from one service name say ABCD. Since there are multiple, it is... (8 Replies)
Discussion started by: chiru_h
8 Replies

2. Shell Programming and Scripting

shell script to remove old files and write to a log file

Hi, I have a script that works on a unix box but am trying to get it working on a linux box that uses shell. I am not a programmer so this is proving harder than I imagined. I made some changes and ended up with the script below but when I run it I get the following messages. Any help would be... (4 Replies)
Discussion started by: yabai
4 Replies

3. Shell Programming and Scripting

Can anybody write this bash script ?

hi, first congratulations on the nice forum! Can anybody write script, which can make copy of some or all files of the current directory in new directory (called "backups", which must be made in the current directory, if it's not already exist). And bring out a massage (report) with the count... (7 Replies)
Discussion started by: Cecko
7 Replies

4. Shell Programming and Scripting

How to write bash script to explode multiple zip files

I have a directory full of zip files. How would I write a bash script to enumerate all the zip files, remove the ".zip" from the file name, create a directory by that name and unzip each zip file into its corresponding directory? Thanks! Siegfried (3 Replies)
Discussion started by: siegfried
3 Replies

5. Shell Programming and Scripting

Write a new file from 2 files as input to the script

Hi- I am hoping someone can give me some pointers to get me started. I have a file which contains some dn's .e.g file 1 cn=bob,cn=user,dc=com cn=kev,cn=user,dc=com cn=john,cn=user,dc=com I have a second file e.g. file.template which looks something like :- dn: <dn> objectclass:... (5 Replies)
Discussion started by: sniper57
5 Replies

6. Homework & Coursework Questions

How to write script in bash.

I am very new to Linux/Unix. Kindly assist the following: I wish to write a bash shell script called how_many_to_go that calculates and prints the number of days, hours, minutes and/or seconds until the end of the current month (based on the output of the date command). Do ... (2 Replies)
Discussion started by: alobi
2 Replies

7. Shell Programming and Scripting

how to write bash script that will automatically extract zip file

i'm trying to write a bash script that that will automatically extract zip files after the download. i writed this script #!/bin/bash wget -c https://github.com/RonGokhle/kernel-downloader/zipball/master CURRENDIR=/home/kernel-downloader cd $CURRENDIR rm $CURRENDIR/zipfiles 2>/dev/null ... (2 Replies)
Discussion started by: ron gokhle
2 Replies

8. UNIX for Dummies Questions & Answers

Write pid and command name to a txt file while executing a bash script

Hi All, Just have a requirement, I am executing a bash shell script, my requirement is to catch the pid and job name to a txt file in the same directory, is there anyway to do it? please help me out. Regards Rahul ---------- Post updated at 08:42 AM ---------- Previous update was at... (2 Replies)
Discussion started by: rahulkalra9
2 Replies

9. Shell Programming and Scripting

Break output file into three files

Help! :) I am getting an output file that looks similar to below. EMAIL_ADDR ----------------------------------------------------------------------------------- user@gmail.com DATABASENAME ----------------------------------------------------------------------------------- db1 db2 db3... (6 Replies)
Discussion started by: cpolikowsky
6 Replies

10. UNIX for Beginners Questions & Answers

How To Write my Bash Script To Automate it?

Hello guys, I need some help. I am new in bash and I don't know how to automate the following script. head -2 out1 > 1.fasta sed ‘1,2 d' out1 > out2 rm out1 head -2 out2 > 2.fasta sed ‘1,2 d' out2 > out1 rm out2 head -2 out2 > 3.fasta sed '1,2 d' out2 > out1 rm out2 .......... (3 Replies)
Discussion started by: dellia222
3 Replies

LEARN ABOUT DEBIAN

jifty::script::model

Jifty::Script::Model(3pm)				User Contributed Perl Documentation				 Jifty::Script::Model(3pm)

NAME

       Jifty::Script::Model - Add a model class to your Jifty application

SYNOPSIS

	   jifty model --name MyFirstModel
	   jifty model --name MyFirstModel --force

	 Options:
	   --name <name>      name of the model
	   --force	      overwrite files

	   --help	      brief help message
	   --man	      full documentation

DESCRIPTION

       Creates a skeleton model file.

   options
       --name NAME (required)
	       Name of the model class.

       --force By default, this will stop and warn you if any of the files it is going to write already exist.	Passing the --force flag will make
	       it overwrite the files.

       --help  Print a brief help message and exits.

       --man   Prints the manual page and exits.

DESCRIPTION

       This creates a skeleton of a new model class for your jifty application, complete with a skeleton of a test suite for it, as well.

METHODS

   run
       Creates a skeleton file under "lib/ApplicationClass/Model/Model", as well as a skeleton tests file.

DESCRIPTION

       A basic test harness for the $model model.

perl v5.14.2							    2010-09-25						 Jifty::Script::Model(3pm)
All times are GMT -4. The time now is 12:00 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy