Timezone setup for Ubuntu 14 and up

There's a new way of setting up the timezone in Ubuntu -- no more cat.

First, find your timezone by running this command:

timedatectl list-timezones

We are in Eastern Time, so we picked America/New_York. Then we run this command to set the timezone:

timedatectl set-timezone America/New_York


Check to make sure the timezone has been set:

timedatectl

You should get something like this:

Local time: Sun 2017-01-01 17:02:19 EST
  Universal time: Sun 2017-01-01 22:02:19 UTC
        RTC time: Sun 2017-01-01 22:07:57
        Timezone: America/New_York (EST, -0500)
     NTP enabled: yes
NTP synchronized: no
 RTC in local TZ: no
      DST active: no
 Last DST change: DST ended at
                  Sun 2016-11-06 01:59:59 EDT
                  Sun 2016-11-06 01:00:00 EST
 Next DST change: DST begins (the clock jumps one hour forward) at
                  Sun 2017-03-12 01:59:59 EST
                  Sun 2017-03-12 03:00:00 EDT

To prevey the clock from drifting, you can setup NTP:

apt-get install ntp

and that's it.