Last week I posted about how you can now use Windows Server Backup in Windows Server 2012 to backup virtual machines. One of the first questions that people had was “how do I do this from the command-line?” So – let me show you!
The tool you will want to use is “wbadmin.exe”
Backing up a virtual machine is fairly straight forward. Your command will look like this:
wbadmin start backup –backupTarget:<location to backup to> –hyperv:<list of virtual machines to backup>
--> Please see the rest on the blog : http://blogs.msdn.com/b/virtual_pc_guy/archive/2013/02/25/backing-up-hyper-v-virtual-machines-from-the-command-line.aspx