Hardening Debian 10

Hardening is defined as the process of securing your systems. Most users are satisfied with the default security settings and don’t even bother to control these settings. This negligence makes them vulnerable to security breaches, as it is risky to simply rely on the default settings for perfect security. Often, the default settings are only used to create a false sense of security or illusion, and many innocent users fall prey to this trap. Those who are concerned about the security of their system prefer to take additional measures to improve security. This article will share some helpful tips that you can use when hardening your Debian 10 system.

Debian 10 Hardening Tips

To harden your Debian 10 system, use the tips below:

Tip # 1

Some of the most important security settings are found in your system BIOS. Therefore, users without administrator rights should not be allowed to tamper with these settings. To prevent this from happening, you must protect your BIOS with a password.

Tip # 2

Before installing Debian 10, you must encrypt your hard drive. This is for privacy reasons. Even if your laptop or computer is lost or stolen, no one can access your personal and important data if your hard drive is encrypted. So, you must take this step before it’s too late.

Tip # 3

If your computer system contains very important data, you should regularly back up your data. These backups must be available both onsite and offsite so that, in the event of a disaster, you can recover data from the most appropriate backup option available. In addition, files for critical systems must be stored on separate partitions. This improves the overall performance of your system in addition to improving security.

Tip # 4

You should also keep your Debian 10 system up to date and updated to ensure you have all the latest security fixes. To do this, follow these steps:

1. First, launch the terminal. Click the “Actions” tab on the desktop and type “terminal” in the search bar that appears. Click the search result to open a terminal window, as shown in the image below:

2. Then enter the following command on your system and press the Enter key:

sudo apt-get update

This command is also shown in the following image:

Hardening Debian 10

3. After successfully executing this command, enter the following command in your terminal and press the Enter key:

sudo apt-get upgrade

After completing the steps above, your Debian 10 system will be up-to-date and updated.

Tip 5

You should also closely monitor all packages installed on your system so that you can remove any unnecessary packages regularly. To view all installed packages on Debian 10, follow these steps:

* Start a terminal as described in the method above. Type the following command in the terminal and press Enter:

sudo dpkg-query –l | less

The result of this command is shown in the image below:

Hardening Debian 10

Council number 6

You should also keep track of all open ports. This is necessary because irrelevant open ports can lead to serious security issues. To check all open ports on your system, follow these steps:

1. Start the terminal as described in the method above. Type the following command in the terminal and press Enter:

ss –lntup

2. After successfully executing this command, you will see a list of all ports on your Debian 10 system and their states, as shown in the following image:

Hardening Debian 10


By following the helpful tips in this article, you can easily harden Debian 10 to protect your system. The best thing about all of these tips is that they are extremely simple and don’t require any special knowledge. Even a beginner can easily follow these tips and strengthen their Debian 10 system. This not only protects critical data, but also protects the Debian 10 system from many potential security threats.