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In various tutorials throughout the history of LearnLinuxTV, we’ve gone over the importance of using public keys with OpenSSH. But what do you do when you have multiple clients you work with, how do you manage keys between them? In this video, we’ll go through an example scenario where we have three clients, and we need to maintain multiple SSH keys for each.
When creating a deployment image or template for distributing Linux to devices or servers, it’s a good idea to make sure that you reset the host keys for SSH. In this video, I’ll show you an easy method I found for automating this.
You can find the systemd unit file I used in the video here.
(more…)TheLog4Shell vulnerability is taking the Internet by storm, and it’s already being used for real-world attacks. In this video, Jay discusses the details around Log4Shell vulnerability in Log4j, and also CrowdSec’s community-based response to the situation.
CrowdSec is a cutting-edge security solution for your Linux servers. As an intrusion prevention system, its goal is to stop unauthorized access and prevent attacks. But unlike other IPS solutions, it does it a different way – by using knowledge as power. CrowdSec was covered on this channel before, but in this video, you’ll see an updated look complete with an overview of how to set up protection for WordPress as well.
Although there’s no such thing as a “perfect” deployment image, including some sane defaults into your images and templates can save you a lot of work down the road, and also give you the opportunity to include more secure defaults. In this episode, we’ll discuss deployment image defaults as well as some recent news.
We’ve talked about Enterprise Linux Security from the worldview of the system administrator, but what’s it like on the other side? In this episode, Jay and Joao are joined by Atalay Kelestemur, an Ethical Hacker, as we discuss the mindset of the attacker.
Migrating your servers from one Linux distribution to another can be a daunting task, even moreso if it’s a migration you’re doing because of unforeseen events or changes within the ecosystem. In this video, Jay and Joao discuss the challenges when it comes to migrating Linux distributions, and the effect this has on security.
Rebooting is a pain, and in some organizations, downright tedious. Shuffling virtual machines between hosts in a cluster is even more tedious, and when it’s time to install patches, that’s what many administrators are forced to do. In this video, I check out QEMUCare, which aims to live-patch QEMU to avoid VM shuffling. In particular, we’ll look at installing ePortal (which deploys the patches) and also an example scenario.
CrowdSec is a solution that aims to help protect your Linux servers, and its approach is quite different than other solutions. CrowdSec is able to utilize reputation to make intelligent decisions, and is able to be extended to meet your needs. In this video, I take a first look at CrowdSec – I’ll show you the installation process and also an example scenario so you can see it in action.
