How To Install ntpwait on Ubuntu 21.04

One-liner install command

For those in a hurry, here's a one-line installation command:

sudo apt-get update && sudo apt -y install ntpsec

But if you are interested in the detailed steps with descriptions, the following information is for you.

What is ntpwait and what are the ways to install it?

Before beginning this tutorial, you will need access to a server or computer running Ubuntu 21.04. This guide was written specifically with a server running Ubuntu 21.04 in mind, although it should also work on older, supported versions of the operating system.

Also, make sure you are running a regular, non-root user with sudo privileges configured on your server. When you have an account available, log in as your non-root user to begin.

There are several ways to install ntpwait on Ubuntu 21.04. You can use (links are clickable):

In the following sections, we will describe each method in detail. You can choose one of them or refer to the recommended one.

Install ntpwait using apt-get

First, update apt database with apt-get using the following command.

sudo apt-get update

After updating apt-get database, You can install ntpwait using apt by running the following command:

sudo apt -y install ntpsec

Install ntpwait using apt

Because ntpwait is available in Ubuntu 21.04’s default repositories, it is possible to install it from these repositories using the apt packaging system.

To begin, update apt database with apt using the following command.

sudo apt update

After updating apt database, You can install ntpwait using apt by running the following command:

sudo apt -y install ntpsec

Install ntpwait using aptitude

If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu 21.04. Update apt database with aptitude using the following command.

sudo aptitude update

After updating aptitude database, You can install ntpwait by running the following command:

sudo aptitude -y install ntpsec

How to upgrade (update) a single package ntpwait using apt-get?

First, you will need to update packages index. Run update command as usual:

sudo apt-get update

Next, to upgrade only the ntpwait, e.g. single package, you should use the following format with the apt-get command/apt command:

sudo apt-get --only-upgrade install ntpsec

Note that this command will not install any new packages! If you wish to install the package if it doesn't exist you may leave out --only-upgrade part.

sudo apt-get install ntpsec

How To Uninstall ntpwait from Ubuntu 21.04

To uninstall only the ntpwait package you can execute the following command:

sudo apt-get remove ntpsec

Uninstall ntpwait and all its dependencies

To uninstall ntpwait and its dependencies that are no longer needed by Ubuntu 21.04, you can use the command below:

sudo apt-get -y autoremove ntpsec

Remove ntpwait with all configurations and data

To remove ntpwait configuration and data from your system you can run the following purge command:

sudo apt-get -y purge ntpsec

Remove ntpwait completely (configurations, data and all of its dependencies)

And lastly, you can run the next command to remove absolutely everything related to ntpwait package, e.g.: configurations, data and all of its dependencies. Just use this command:

sudo apt-get -y autoremove --purge ntpsec

Extra info and code examples

NTP, the Network Time Protocol, is used to keep computer clocks accurate by synchronizing them over the Internet or a local network, or by following an accurate hardware receiver that interprets GPS, DCF-77, or similar time signals. This package contains the NTP daemon and utility programs. An NTP daemon needs to be running on each host that is to have its clock accuracy controlled by NTP. The same NTP daemon is also used to provide NTP service to other hosts. This is the NTPsec version of NTP. NTPsec is a secure, hardened, and improved implementation derived from the original NTP project. For more information about the NTP protocol and NTP server configuration and operation, install the package "ntpsec-doc".

Conclusion

You now have a full guide on how to install ntpwait using apt, apt-get and aptitude tools. Also, we showed how to update as a single package and different ways to uninstall the ntpwait from Ubuntu 21.04.

See also: