1. # install and run ntpdate:
    echo NTPSERVERS="134.58.255.1" >> /etc/default/ntpdate
    apt-get install ntpdate
    /etc/init.d/ntpdate restart
    
  2. # set your machine's time zone correctly:
    sudo tzconfig
    
  3. # read out the hardware clock of your computer:
    sudo hwclock