How To Install ntp on Debian 11
Introduction
In this tutorial we learn how to install ntp on Debian 11.
What is ntp
ntp is:
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, NIST 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.
For more information about the NTP protocol and NTP server configuration and operation, install the package “ntp-doc”.
There are three methods to install ntp on Debian 11. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install ntp Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install ntp using apt-get by running the following command:
sudo apt-get -y install ntp
Install ntp Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install ntp using apt by running the following command:
sudo apt -y install ntp
Install ntp 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 Debian. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install ntp using aptitude by running the following command:
sudo aptitude -y install ntp
How To Uninstall ntp on Debian 11
To uninstall only the ntp package we can use the following command:
sudo apt-get remove ntp
Uninstall ntp And Its Dependencies
To uninstall ntp and its dependencies that are no longer needed by Debian 11, we can use the command below:
sudo apt-get -y autoremove ntp
Remove ntp Configurations and Data
To remove ntp configuration and data from Debian 11 we can use the following command:
sudo apt-get -y purge ntp
Remove ntp configuration, data, and all of its dependencies
We can use the following command to remove ntp configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge ntp
Dependencies
ntp have the following dependencies:
References
Summary
In this tutorial we learn how to install ntp package on Debian 11 using different package management tools: apt, apt-get and aptitude.