How to sync time on host wake-up within VirtualBox?

Question

I am running an Ubuntu 12.04-based box inside of Vagrant using VirtualBox. So far, everything is fine - except for one thing:

Let\'s assume that the VM is running. T

Answer 1

I give an other solution to sync time between guest & host without installing Virtualbox guest addition:

1. install ntp on your guest, and de-comment these lines in /etc/ntp.conf:

   disable auth
   broadcastclient
   

Then, restart ntp with service ntp restart

2. Active broadcast on your host:

   • For Linux users, edit your /etc/ntp.conf file and configure broadcast (you must adapt IP):

     broadcast 192.168.123.255

   • For Windows users, activate the "Windows Time" service. You can then read this page to configure it to broadcast time

   Then, restart time service on host.