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Full Discussion: tar archive
Operating Systems Linux tar archive Post 302410768 by sun2ecliptic on Tuesday 6th of April 2010 08:56:22 PM
Old 04-06-2010
You're really only left with one option for restoring from tarball, aside from going into rescue mode. First, put the tarball on some sort of removable media (likely an external USB hard drive, given the size). Second, do a fresh install on the system in question. Mount the external media with the tarball. Extract the usual configuration directories (/etc/, /usr/local/, /opt, /var/lib) and /home, after installing the software required.

Hypothetically, you could uncompress the tarball somewhere else and do a straight dd or block level copy, but I have my doubts that would work unless you manipulated the boot loader after, to agree with the uncompressed kernel and content. I agree with ahyes, the bigger picture is coming up with a better backup method. You can backup with tar, but using tar to backup is really more of a supplemental solution to configurations, databases, home directories - not binaries. You're best bet, if using tar to backup everything important, is to create a kickstart image. That way, if you need to restore, you simply run the kickstart and extract your tar.

Last edited by sun2ecliptic; 04-06-2010 at 10:04 PM..
 

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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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