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Top Forums Shell Programming and Scripting Chksum on two directories then copy if they are not identical or existing Post 303000178 by Chubler_XL on Wednesday 5th of July 2017 09:45:27 PM
Old 07-05-2017
It is also worth looking a rsync which has these features and more:

Code:
$ rsync -ac --dry-run $SRCPATH/ $DSTPATH

-a archive mode (see manual, basically recursive whole directory)
-c skip based on checksum, not mod-time & size


remove --dry-run above if everything looks OK to you
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virt-copy-in(1) 					      Virtualization Support						   virt-copy-in(1)

NAME
virt-copy-in - Copy files and directories into a virtual machine disk image. SYNOPSIS
virt-copy-in -a disk.img file|dir [file|dir ...] /destination virt-copy-in -d domain file|dir [file|dir ...] /destination WARNING
Using "virt-copy-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-copy-in" copies files and directories from the local disk into a virtual machine disk image or named libvirt domain. You can give one of more filenames and directories on the command line. Directories are copied in recursively. The final parameter must be the destination directory in the disk image which must be an absolute path starting with a "/" character. EXAMPLES
Update "/etc/resolv.conf" in a guest: virt-copy-in -d MyGuest resolv.conf /etc Upload a home directory to a guest: virt-copy-in -d MyGuest skel /home JUST A SHELL SCRIPT WRAPPER AROUND GUESTFISH
This command is just a simple shell script wrapper around the guestfish(1) "copy-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-out(1), virt-edit(1), virt-tar-in(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-copy-in(1)
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