Filter rules for firewalls can be tricky. As the successor to iptables, nftables simplifies the process of creating and maintaining firewall rules.

The Google Authenticator PAM module allows you to use time-based Google Authenticator passwords with various Linux services, including SSH.

Machine learning can be maliciously manipulated – we'll show you how.

The complexity of modern distributions offers many potential attack vectors for malware. Lynis lets you find these vulnerabilities before an attacker does.

An overlay network will help you block unwanted eavesdroppers on the Internet. We show you some of the leading open source options.

Bring your remote management into focus with these graphical front ends for SSH.

Diaspora, Friendica, and Mastodon are free and decentralized microblogging platforms that keep you in control of your data.

The Thunderbolt interface supports extremely fast data transfer rates, but be careful about what you plug into your port, because Thunderbolt devices access memory directly. We'll show you some Linux tools for locking down your Thunderbolt interface.