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Full Discussion: Piping commands using xargs
Top Forums UNIX for Beginners Questions & Answers Piping commands using xargs Post 303008244 by april on Wednesday 29th of November 2017 08:09:14 AM
Old 11-29-2017
Piping commands using xargs

Need help in piping commands using xargs

I have several .tar.gz files that I need to list the folder content in a subdirectory.
For example,
Code:
a.tar.gz
b.tar.gz
c.tar.gz

The following command works great for each .tar.gz file but it's a pain to run the tar command for each file.
Code:
tar -tf a.tar.gz|grep folder1/folder2

I tried this command and failed.
Code:
ls *.tar.gz|xargs tar -tf|grep folder1/folder2

I got this error message "tar: a.tar.gz: Not found in archive" for each gz file.

What do I need to fix to run this command successfully?
Or do I need to use a different command to process all the .tar.gz files?

Thank you.

Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!

Last edited by RudiC; 11-29-2017 at 09:20 AM.. Reason: Added CODE tags.
 

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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)
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