Rsync Script to Migrate Linux Servers. All the heavy lifting was done here. (http://www.mariusv.com/migrate-linux-servers-across-cloud-providers/) I just added more system directories to be ignored for Ubuntu and other flavors.

migrate.sh

#!/bin/bash
# @Description MigrateME
# @Usage Copy to the source server and run with: sh migrateMe.sh
# @Version 1.0.2
# @Date Last Modified 22/01/2011
# @Author Marius Voila <http://www.mariusv.com>
# @Copyright (c) 2011 mariusv under GNU GPL v2.0+
 
# @Returns success or failure
function is_root_user() {
    [ $(id -u) -eq 0 ] && return 0 || return 1
}
 
# @Returns text and if not root user exits with code 1 (error)
function require_root_user() { 
    if is_root_user
    then
        echo "Are We Runnning As Root? [ Yes ]"
    else
        echo "Are We Running As Root? [ No ]"
        echo "Fatal Error: You must be logged in as root to execute this shell script."
        exit 1
    fi   
}
 
require_root_user
 
read -p "Provide the destination server IP address or hostname: " destination_ip_address
 
echo -e "\n"
echo "##########################################################################"
echo "###   WHEN PROMPTED, PROVIDE THE DESTINATION SERVERS ROOT PASSWORD.    ###"
echo "##########################################################################"
echo -e "\n"
 
#Install rsync on the destination
ssh root@$destination_ip_address apt-get -y install rsync
 
#Make sure we were able to ssh successfully
rc=$?
[ "$rc" = "255" ] && exit 1
 
#Install rsync on the source
apt-get -y install rsync
 
#Yum clean all on the source, to free up some disk space
apt-get clean all
 
#Create the rsync_excludes file on the source
echo -e "/boot\n/proc\n/sys\n/tmp\n/dev\n/etc/fstab\n/etc/mdadm.conf\n/etc/mtab\n/etc/resolv.conf\n/etc/conf.d/net\n/etc/network/interfaces\n/etc/networks\n/etc/sysconfig/network*\n/etc/sysconfig/hwconf\n/etc/sysconfig/ip6tables-config\n/etc/sysconfig/kernel\n/etc/hostname\n/etc/HOSTNAME\n/etc/hosts\n/etc/modprobe*\n/etc/modules\n/etc/udev\n/net\n/lib/modules\n/etc/rc.conf\n/etc/sysconfig/network-scripts/ifcfg-eth*" > /rsync_excludes.txt
 
#Stop critical services on source
for i in lighttpd httpd nginx mysqld postgresql proftpd postfix
do
    #Set rc equal to status code
    service $i status 2>/dev/null
    rc=$?
 
    #If status equals 0, we know its running, and can stop it
    [ "$rc" == "0" ] && service $i stop
done
 
echo -e "\n"
echo "##########################################################################"
echo "###   WHEN PROMPTED, PROVIDE THE DESTINATION SERVERS ROOT PASSWORD.    ###"
echo "##########################################################################"
echo -e "\n"
 
#Do the rsync
rsync -avz --delete --exclude-from=/rsync_excludes.txt / root@${destination_ip_address}:/
 
#Make sure we were able to login successfully
rc=$?
[ "$rc" = "255" ] && exit 1
 
echo -e "\n"
echo "##########################################################################"
echo "###   WHEN PROMPTED, PROVIDE THE DESTINATION SERVERS ROOT PASSWORD.    ###"
echo "##########################################################################"
echo -e "\n"
 
#First we have to clear the source known_hosts file
echo > ~/.ssh/known_hosts
 
#Delete the rsync_excludes.txt file on the destination
ssh root@$destination_ip_address rm -f /rsync_excludes.txt
 
#Complete
echo -e "\n"
echo "########################################################################"
echo "#                          ! VERY IMPORTANT !                          #"
echo "# You MUST go into the destination server and modify the network file. #"
echo "#  The destination GATEWAY ADDRESS must be updated before you reboot.  #"
echo "#                                                                      #"
echo "#                     Modify /etc/sysconfig/network                    #"
echo "#                                                                      #"
echo "# Update the gateway address to the proper destination server address. #"
echo "#                                                                      #"
echo "#  AGAIN, THE DESTINATION GATEWAY ADDRESS MUST BE UPDATED BEFORE YOU   #"
echo "#  REBOOT. FAILURE TO DO THIS, MAY RESULT IN THE DESTINATION SERVER    #"
echo "#  BEING INACCESSIBLE.                                                 #"
echo "########################################################################"
echo -e "\n"
echo "########################################################################"
echo "### PLEASE --REBOOT-- THE DESTINATION SERVER TO FINALIZE MIGRATION.  ###"
echo "########################################################################"
echo -e "\n"
 
exit 0