How to set or change timezone on Ubuntu

How to set or change timezone on Ubuntu 22.04

The test environment

docker run -d --privileged --name ubunut anti1346/ubuntu2204:systemd

docker exec -it ubunut bash

 

To set or change the timezone on Ubuntu, you can follow the steps below

1. Check the current timezone configuration

timedatectl show

$ timedatectl
               Local time: Mon 2023-06-19 11:19:07 UTC
           Universal time: Mon 2023-06-19 11:19:07 UTC
                 RTC time: n/a
                Time zone: UTC (UTC, +0000)
System clock synchronized: no
              NTP service: inactive
          RTC in local TZ: no

2. List the available timezones

timedatectl list-timezones

$ timedatectl list-timezones
UTC

3. Change the timezone

sudo timedatectl set-timezone [timezone]

For example, if you want to set the timezone to Asia/Seoul, you would run the following command:

sudo timedatectl set-timezone Asia/Seoul

How to fix the error

$ sudo timedatectl set-timezone Asia/Seoul
Failed to set time zone: Invalid or not installed time zone 'Asia/Seoul'

apt-get update

sudo apt-get install -y tzdata

timedatectl list-timezones | grep -i seoul

$ timedatectl list-timezones | grep -i seoul
Asia/Seoul

4. Verify the changed timezone

timedatectl show

$ timedatectl show
Timezone=Asia/Seoul
LocalRTC=no
CanNTP=yes
NTP=no
NTPSynchronized=no
TimeUSec=Mon 2023-06-19 20:27:01 KST

5. Synchronize the system time after changing the timezone

sudo systemctl restart systemd-timesyncd

This command will synchronize the system time with the updated timezone.

6. Verify the applied timezone

date

$ date
Mon Jun 19 20:27:51 KST 2023

This command will display the current time according to the updated timezone.

 

By following the above steps, you can set or change the timezone on your Ubuntu system.