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Full Discussion: How to create .tgz file without creating .tar file?
Top Forums UNIX for Dummies Questions & Answers How to create .tgz file without creating .tar file? Post 302720449 by bakunin on Wednesday 24th of October 2012 07:32:08 AM
Old 10-24-2012
Quote:
Originally Posted by Pawan Kumar
tar -pczf MyBackup.tar.gz <file which needs to be inside>

will above command standard?

I have only concern is that wthether the above command generates tar file temporarily then delete afterwards? or it not at all generates tar file?
"tar" is a standard command. The standard version of "tar" has no "-z" switch at all, therefore you can't expect it to be able to understand it. Only the GNU version of "tar" has this extension. Therefore the second version Corona688 told you should be preferred. It will work everywhere, including GNU systems, while your version will work ONLY on GNU systems:

Code:
tar -cf - <files/paths to be included> | gzip > /path/to/output.tgz

It is generally better not to rely on extensions to the standard but to use only what the standard defines. By "standard" i mean POSIX here.

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

virt-tar-in

virt-tar-in(1)						      Virtualization Support						    virt-tar-in(1)

NAME

       virt-tar-in - Unpack a tarball into a virtual machine disk image.

SYNOPSIS

	virt-tar-in -a disk.img data.tar /destination

	virt-tar-in -d domain data.tar /destination

	zcat data.tar.gz | virt-tar-in -d domain - /destination

WARNING

       Using "virt-tar-in" on live virtual machines can be dangerous, potentially causing disk corruption.  The virtual machine must be shut down
       before you use this command.

DESCRIPTION

       "virt-tar-in" unpacks an uncompressed tarball into a virtual machine disk image or named libvirt domain.

       The first parameter is the tar file.  Use "-" to read the tar file from standard input.	The second parameter is the absolute target
       directory to unpack into.

EXAMPLES

       Upload a home directory to a guest:

	virt-tar-in -d MyGuest homes.tar /home

JUST A SHELL SCRIPT WRAPPER AROUND GUESTFISH

       This command is just a simple shell script wrapper around the guestfish(1) "tar-in" 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-make-fs(1), virt-tar-out(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-in(1)
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