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 found a solution:

1. install ntpdate
2. add "s" permission for ntpdate, this allows non-root users to run ntpdate as root: sudo chmod u+s /usr/sbin/ntpdate
3. add one line in ~/.bashrc: ntpdate -u ntp.ubuntu.com

After that, each time you login to the linux system, the time will be sync once.