The ‘timedatectl‘ command is a new utility for RHEL-based and Debian-based distributions. It is a part of the ‘systemd‘ system and service manager, serving as a replacement for the old traditional date command used in ‘sysvinit‘ daemon-based Linux distributions.

The timedatectl command allows you to query and change the configuration of the system clock and its settings, you can use this command to set or change the current date, time, and timezone or enable automatic system clock synchronization with a remote NTP server.

In this tutorial, am going to take you through the ways you can manage time on your Linux system by setting the date, time, timezone, and synchronize time with NTP from the terminal using the new timedatectl command.

It is always a good practice to maintain the correct time on your Linux server or system and it can have the following advantages:

  • maintain a timely operation of system tasks since most tasks in Linux are controlled by time.
  • the correct time for logging events and other information on the system and many more.

How to Find and Set Local Timezone in Linux

1. To display the current time and date on your system, use the timedatectl command from the command line as follows:

# timedatectl status
Check Time and Date
Check Time and Date

In the screencast above, RTC time is the hardware clock time.

2. The time on your Linux system is always managed through the timezone set on the system, to view your current timezone, do it as follows:

# timedatectl OR
# timedatectl | grep Time
Check Linux Time Zone
Check Linux Time Zone

3. To view all available timezones, run the command below:

# timedatectl list-timezones
List All Timezones in Linux
List All Timezones in Linux

4. To find the local timezone according to your location, run the following command:

# timedatectl list-timezones | egrep -o "Asia/B.*"
# timedatectl list-timezones | egrep -o "Europe/L.*"
# timedatectl list-timezones | egrep -o "America/N.*"
Find Local Timezone in Linux
Find Local Timezone in Linux

5. To set your local timezone in Linux, we will use the set-timezone switch as shown below.

# timedatectl set-timezone "Asia/Kolkata"
Set Local Timezone in Linux
Set Local Timezone in Linux

It is always recommended to use and set the coordinated universal time, UTC.

# timedatectl set-timezone UTC
Set UTC Time in Linux
Set UTC Time in Linux

You need to type the correct name timezone otherwise you may get errors when changing the timezone, in the following example, the timezone “Asia/Kolkata” is not correct therefore causing the error.

Set Correct Timezone in Linux
Set Correct Timezone in Linux

How to Set Time and Date in Linux

6. You can set the date and time on your system, using the timedatectl command as follows:

Set Time in Linux

To set time only, we can use a set-time switch along with the format of time in HH:MM:SS (Hour, Minute, and Seconds).

# timedatectl set-time 15:58:30
Set Local Time in Linux
Set Local Time in Linux

You may get the below error when setting the date as shown above:

Failed to set time: NTP unit is active

7. The error says that the NTP service is active. You need to disable it using the below command.

# systemctl disable --now chronyd

Set Date and Time in Linux

8. To set date and time, we can use a set-time switch along with the format of date in YY:MM:DD (Year, Month, Day) and time in HH:MM:SS (Hour, Minute, and Seconds).

# timedatectl set-time '2015-11-20 16:14:50'
Set Date in Linux
Set Date in Linux
Set Date and Time in Linux
Set Date and Time in Linux

How to Find and Set Hardware Clock in Linux

9. To set your hardware clock to coordinated universal time, UTC, use the set-local-rtc boolean-value option as follows:

First Find out if your hardware clock is set to the local timezone:

# timedatectl | grep local

Set your hardware clock to the local timezone:

# timedatectl set-local-rtc 1
Set Hardware Clock Timezone
Set Hardware Clock Timezone

Set your hardware clock to coordinated universal time (UTC):

# timedatectl set-local-rtc 0
Set Hardware Clock to UTC
Set the Hardware Clock to UTC

Synchronizing Linux System Clock with a Remote NTP Server

NTP stands for Network Time Protocol is an internet protocol, which is used to synchronize the system clock between computers. The timedatectl utility enables you to automatically sync your Linux system clock with a remote group of servers using NTP.

Please note that you must have NTP installed on the system to enable automatic time synchronization with NTP servers.

To start automatic time synchronization with a remote NTP server, type the following command at the terminal.

# timedatectl set-ntp true

To disable NTP time synchronization, type the following command at the terminal.

# timedatectl set-ntp false

Summary

These are very easy examples described in this tutorial and I hope you will find them helpful for setting various Linux system clocks and timezones. To learn more about this tool, head over to the timedatectl man page.

If you have anything to say about this article, feel free to leave a comment for any more information to add. Stay connected to Tecmint.

Similar Posts