Update Date and Time from Internet in Ubuntu

You can use ntpdate command to update date and time from Internet in Ubuntu. You can synchronize with global server such as pool.ntp.org. The pool.ntp.org project is a big virtual cluster of timeservers providing reliable easy to use NTP service for millions of clients. This is the command.

$ sudo ntpdate id.pool.ntp.org

You can change id.pool.ntp.org to your appropriate location such as jp.pool.ntp.org (Japan), de.pool.ntp.org (Germany), etc.