Sponsored Content
Full Discussion: Two types of pipes?
Top Forums UNIX for Dummies Questions & Answers Two types of pipes? Post 88094 by blowtorch on Monday 31st of October 2005 04:05:32 PM
Old 10-31-2005
Two types of pipes?

What is the difference between:
Code:
cd /tmp
tar -cf - *.txt |gzip > tmp_txt.tar.gz

and
Code:
cd /tmp
mknod pipe p
gzip < pipe > /tmp/tmp_txt1.tar.gz &
tar -cf pipe *.txt

Apart from the fact that we have to create the pipe file manually, is there any difference in the performance of the two? If there is, then which one's better and why?

Last edited by blowtorch; 10-31-2005 at 05:18 PM.. Reason: add line in code
 

8 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

backup types

can anyone explain me difference between tar and ufsdump commands.............and also i wd like to know the difference between incremental and differential backup......... thx in advance (1 Reply)
Discussion started by: girish_shukla
1 Replies

2. Filesystems, Disks and Memory

associated file types

I have a file of type .for extension .In a guui based unix environment like solaris if I double click on that file a specific program designed by me has to run which takes this file as the parameter and exceutes the program. Can anyone help me? (8 Replies)
Discussion started by: nhk_srd
8 Replies

3. Filesystems, Disks and Memory

PIPEs and Named PIPEs (FIFO) Buffer size

Hello! How I can increase or decrease predefined pipe buffer size? System FreeBSD 4.9 and RedHat Linux 9.0 Thanks! (1 Reply)
Discussion started by: Jus
1 Replies

4. UNIX for Dummies Questions & Answers

mime types

Hi, I am trying to launch an ogg movie from a pdf file which has been produced with pdflatex and \movie {\centerline{\includegraphics {grafiques_xerrades/un_manolo_amb_camera.pdf}}} {hlims_xerrades/XocCumuls.ogg} The switch "externalviewer" makes kpdf launch the default... (5 Replies)
Discussion started by: pau
5 Replies

5. What is on Your Mind?

What Types of Food Do You Like The Most?

On another simple topic, multiple choice answers OK ( you can pick more than one or suggest others - we will add your suggestions to the poll ). What Types of Food Do You Like The Most? (27 Replies)
Discussion started by: Neo
27 Replies

6. Homework & Coursework Questions

Help with using different types of GREP

1. The problem statement, all variables and given/known data: Hey there, I'm brand new to using Unix as I just started a course on it in my University, and I currently working through a worksheet which focuses on the many commands and methods of GREP (I'm working through the terminal command... (11 Replies)
Discussion started by: SilvarHawke
11 Replies

7. Shell Programming and Scripting

Cp -r except certain file types

the following excludes certain directories successfully cp -r probe/!(dir) /destination I want to exclude certain file types and tried unsuccessfully cp -r probe/!(*.avi) /destination (2 Replies)
Discussion started by: tmf
2 Replies

8. Programming

Are These All The Integer Types In C

Hello and Good day, I am currently studying C and I just finished learning about variables mainly those of integer type. I am wondering if the list below are all there is to integer variables and there are still more that i have to learn. Here are the list: Char Short int long long long... (3 Replies)
Discussion started by: split_func0
3 Replies
virt-tar-out(1) 					      Virtualization Support						   virt-tar-out(1)

NAME
virt-tar-out - Pack a virtual machine disk image directory into a tarball. SYNOPSIS
virt-tar-out -a disk.img /dir files.tar virt-tar-out -d domain /dir files.tar virt-tar-out -d domain /dir - | gzip --best > files.tar.gz DESCRIPTION
"virt-tar-out" packs a virtual machine disk image directory into a tarball. The first parameter is the absolute path of the virtual machine directory. The second parameter is the tar file to write. Use "-" to write to standard output. EXAMPLES
Download the home directories from a guest: virt-tar-out -d MyGuest /home - | gzip --best > homes.tar.gz JUST A SHELL SCRIPT WRAPPER AROUND GUESTFISH
This command is just a simple shell script wrapper around the guestfish(1) "tar-out" command. For anything more complex than a trivial copy, you are probably better off using guestfish directly. OPTIONS
Since the shell script just passes options straight to guestfish, read guestfish(1) to see the full list of options. SEE ALSO
guestfish(1), virt-cat(1), virt-copy-in(1), virt-copy-out(1), virt-edit(1), virt-tar-in(1), <http://libguestfs.org/>. AUTHORS
Richard W.M. Jones ("rjones at redhat dot com") COPYRIGHT
Copyright (C) 2011 Red Hat Inc. <http://libguestfs.org/> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. libguestfs-1.18.1 2013-12-07 virt-tar-out(1)
All times are GMT -4. The time now is 10:01 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy