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Full Discussion: Is there nobody who's sucessfully used tar -G option???
Top Forums UNIX for Dummies Questions & Answers Is there nobody who's sucessfully used tar -G option??? Post 302162334 by protienplant on Monday 28th of January 2008 08:46:45 PM
Old 01-28-2008
Java Is there ANYBODY who's sucessfully used tar -G option???
Has anyone you know ever used the -G --incremental option successfully with the tar command?

I'm not talking about the little -g --listed-incremental option. I don't want incremental backups. Just one differential backup which is what the -G is for. The -G command is supposed to make a single incremental archive based on the dump archive, when compared to the source directory that the dump archive was originally created from. The incremental archive should contain all files that have been modified since the original dump archive was taken.

Using tar with this option seems like a very prevalent and useful tool for a simple differential backup plan. I have devoured the man file for tar and the GNU tar manual GNU tar 1.19
They don't really say how to use it.

My biggest question is, where in the command do I say which dump.tar file it's supposed to compare to the source directory, in order to make the incremental or difference tar file?

Help is much appreciated.
Last edited by protienplant; 01-29-2008 at 01:31 AM..
 

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LEARN ABOUT DEBIAN

virt-tar-out

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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