Setting the timezone of an Ubuntu (14.04, Trusty) or Debian (7, Wheezy) server from the command-line is simple. Just run
dpkg-reconfigure tzdata and follow the on-screen prompts. However, if you are running an unattended installation, you might want to avoid interactive prompts and just gets the job done. To do this, simply run
$ sudo ln -sf /usr/share/zoneinfo/America/Anchorage /etc/localtime
/usr/share/zoneinfo/ to locate your timezone.