How To Install ca-certificates on Debian 9
Introduction
In this tutorial we learn how to install ca-certificates on Debian 9.
What is ca-certificates
ca-certificates is:
Contains the certificate authorities shipped with Mozilla’s browser to allow SSL-based applications to check for the authenticity of SSL connections.
Please note that Debian can neither confirm nor deny whether the certificate authorities whose certificates are included in this package have in any way been audited for trustworthiness or RFC 3647 compliance. Full responsibility to assess them belongs to the local system administrator.
There are three methods to install ca-certificates on Debian 9. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install ca-certificates Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install ca-certificates using apt-get by running the following command:
sudo apt-get -y install ca-certificates
Install ca-certificates Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install ca-certificates using apt by running the following command:
sudo apt -y install ca-certificates
Install ca-certificates 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 ca-certificates using aptitude by running the following command:
sudo aptitude -y install ca-certificates
How To Uninstall ca-certificates on Debian 9
To uninstall only the ca-certificates package we can use the following command:
sudo apt-get remove ca-certificates
Uninstall ca-certificates And Its Dependencies
To uninstall ca-certificates and its dependencies that are no longer needed by Debian 9, we can use the command below:
sudo apt-get -y autoremove ca-certificates
Remove ca-certificates Configurations and Data
To remove ca-certificates configuration and data from Debian 9 we can use the following command:
sudo apt-get -y purge ca-certificates
Remove ca-certificates configuration, data, and all of its dependencies
We can use the following command to remove ca-certificates configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge ca-certificates
Dependencies
ca-certificates have the following dependencies:
References
Summary
In this tutorial we learn how to install ca-certificates package on Debian 9 using different package management tools: apt, apt-get and aptitude.
