Resolution of Errors : How to Fix “Device eth0 does not seem to be present, delaying initialization” Error on Centos

OS Based            : Linux Centos 6.3 64Bit
Command to use : ifconfig, ifup, rm, reboot, service

I was copying my Oracle Virtual Box VMs from PC to Laptop,Server power on successfully but when I try to connect to the network the VM is isolated.  

Symptoms :

• Check the network using ifconfig command it seems that eth0 has no IP Address
• Restart the the whole network service using service network restart, error shown "Device eth0 does not seem to be present, delaying initialization"

Solutions :

• Remove file 70-persistent-net.rules in order to re-genereate MAC address when the server start-up.

• 
  

Tools : Softera LDAP Browser

I found this very help full tools to query my Windows Server 2008 Active Directory, as Stupid Administrator usually I used Active Directory Users and Computers console to find information trough object properties, then my Boss ask me to find "How many Users are not logged in for the last 30, 90, 180 and 360 days ?" I knew that this last logged in information are recorded in Active Directory Database, but how do I collect them, so I need tools to filter which user that meet my Boss criteria want. Then I found this tools Softera LDAP Browser 4.5 as explain in their official web, this tools help to browsing, search, export etc, every kind of LDAP database including Windows Server Active Directory. It's free license and can run under operating system at least Windows XP SP2, me using Windows 8.1 Pro x64 and running well without any problems. I download installation file from this link : http://www.ldapadministrator.com/download.htm There's a 64Bit Installer but I don't know why not working on my 64bit Windows 8.1 pro, so I just installed 32bit version.