How To Install crypto-policies on Ubuntu

Posted on April 1, 2023  (Last modified on May 20, 2023 )

2 minutes  • 382 words

Introduction

In this tutorial we learn how to install crypto-policies on Ubuntu.

What is crypto-policies

crypto-policies is:

“crypto-policies” is a utility to unify the crypto policies used by different applications and libraries. The current implementations works by setting the desired policy in /etc/crypto-policies/config. After this file is changed the script ‘update-crypto-policies’ should be executed, and the new policies will activate.

The supported back ends are:

• GnuTLS
• OpenSSL
• NSS
• BIND9
• libkrb5
• OpenSSH
• Java (OpenJDK)
• libssh
• libreswan

There are three methods to install crypto-policies on Ubuntu. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.

Install crypto-policies Using apt-get

Update apt database with apt-get using the following command.

sudo apt-get update

After updating apt database, We can install crypto-policies using apt-get by running the following command:

sudo apt-get -y install crypto-policies

Install crypto-policies Using apt

Update apt database with apt using the following command.

sudo apt update

After updating apt database, We can install crypto-policies using apt by running the following command:

sudo apt -y install crypto-policies

Install crypto-policies 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. Update apt database with aptitude using the following command.

sudo aptitude update

After updating apt database, We can install crypto-policies using aptitude by running the following command:

sudo aptitude -y install crypto-policies

How To Uninstall crypto-policies on Ubuntu

To uninstall only the crypto-policies package we can use the following command:

sudo apt-get remove crypto-policies

Uninstall crypto-policies And Its Dependencies

To uninstall crypto-policies and its dependencies that are no longer needed by Ubuntu, we can use the command below:

sudo apt-get -y autoremove crypto-policies

Remove crypto-policies Configurations and Data

To remove crypto-policies configuration and data from Ubuntu we can use the following command:

sudo apt-get -y purge crypto-policies

Remove crypto-policies configuration, data, and all of its dependencies

We can use the following command to remove crypto-policies configurations, data and all of its dependencies, we can use the following command:

sudo apt-get -y autoremove --purge crypto-policies

Dependencies

crypto-policies have the following dependencies:

• python3

References

• crypto-policies website

Summary

In this tutorial we learn how to install crypto-policies package on Ubuntu using different package management tools: apt, apt-get and aptitude.