How To Install openssl on Kali Linux

Introduction

In this tutorial we learn how to install openssl on Kali Linux.

What is openssl

openssl is:

This package is part of the OpenSSL project’s implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet.

It contains the general-purpose command line binary /usr/bin/openssl, useful for cryptographic operations such as:

• creating RSA, DH, and DSA key parameters;
• creating X.509 certificates, CSRs, and CRLs;
• calculating message digests;
• encrypting and decrypting with ciphers;
• testing SSL/TLS clients and servers;
• handling S/MIME signed or encrypted mail.

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

Install openssl Using apt-get

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

sudo apt-get update

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

sudo apt-get -y install openssl

Install openssl Using apt

Update apt database with apt using the following command.

sudo apt update

After updating apt database, We can install openssl using apt by running the following command:

sudo apt -y install openssl

Install openssl Using aptitude

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

sudo aptitude update

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

sudo aptitude -y install openssl

How To Uninstall openssl on Kali Linux

To uninstall only the openssl package we can use the following command:

sudo apt-get remove openssl

Uninstall openssl And Its Dependencies

To uninstall openssl and its dependencies that are no longer needed by Kali Linux, we can use the command below:

sudo apt-get -y autoremove openssl

Remove openssl Configurations and Data

To remove openssl configuration and data from Kali Linux we can use the following command:

sudo apt-get -y purge openssl

Remove openssl configuration, data, and all of its dependencies

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

sudo apt-get -y autoremove --purge openssl

Dependencies

openssl have the following dependencies:

• libc6
• libssl1.1

References

• openssl website

Summary

In this tutorial we learn how to install openssl package on Kali Linux using different package management tools: apt, apt-get and aptitude.