#kernel-management

#kernel-management

The vulnerabilities exploit a confused deputy attack. An unauthorized user can manipulate a privileged process to perform actions on their behalf, without having the necessary rights themselves. Specifically, attackers abuse tools such as Sudo or Postfix to modify AppArmor profiles via pseudo-files such as /sys/kernel/security/apparmor/.load and .replace.

Both work with Linux's existing swapping mechanism. Swapping (called paging in Windows) is a way for the kernel to handle running low on available RAM. It chooses pages of memory that aren't in use right now and copies them to disk, then those blocks can be marked as free and reused for something else.

An observability control plane isn't just a dashboard. It's the operational authority system. It defines alert rules, routing, ownership, escalation policy, and notification endpoints. When that layer is wrong, the impact is immediate. The wrong team gets paged. The right team never hears about the incident. Your service level indicators look clean while production burns.

Nested virtualization involves running a hypervisor inside another hypervisor. It is not an entirely bonkers idea because it offers the chance to create a test or simulation environment for the collection of linked VMs that makes up many enterprise IT setups. The technique can also be useful in production for containerised workloads, which often see tools like Kubernetes and Docker run in a VM, and every container running in its own VM.

The Harness Resilience Testing platform extends the scope of the tests provided to include application load and disaster recovery (DR) testing tools that will enable DevOps teams to further streamline workflows.

For years, reliability discussions have focused on uptime and whether a service met its internal SLO. However, as systems become more distributed, reliant on complex internet stacks, and integrated with AI, this binary perspective is no longer sufficient. Reliability now encompasses digital experience, speed, and business impact. For the second year in a row, The SRE Report highlights this shift.

Almost a quarter of those surveyed said they had experienced a container-related security incident in the past year. The bottleneck is rarely in detecting vulnerabilities, but mainly in what happens next. Weeks or months can pass between the discovery of a problem and the actual implementation of a solution. During that period, applications continued to run with known risks, making organizations vulnerable, reports The Register.

I've had several incarnations of the self-hosted home lab for decades. At one point, I had a small server farm of various machines that were either too old to serve as desktops or that people simply no longer wanted. I'd grab those machines, install Linux on them, and use them for various server purposes. Here are two questions you should ask yourself:

I recently wrote about my migration away from VirtualBox to KVM/Virt-Machine for my virtual machine needs. I've found those tools to be far superior (albeit with a bit more of a learning curve) than VirtualBox. Since then, however, I've found another method of working with KVM (the Linux kernel virtual machine technology), one that not only allows me to create and manage virtual machines on my local computer, but also from any machine on my LAN. That tool is Cockpit, which makes managing your Linux machines considerably easier.

For the longest time, Linux was considered to be geared specifically for developers and computer scientists. Modern distributions are far more general purpose now -- but that doesn't mean there aren't certain distros that are also ideal platforms for developers. What makes a distribution right for developers? Although I consider app compatibility, stability, and flexibility to be essential attributes for most any Linux distribution, developers also need the right tools

My favorite Linux desktop distribution, Linux Mint, is considering slowing down its release cadence. That's because, as lead developer Clement "Clem" Lefebvre explained, while releasing often has worked very well, it produces "these incremental improvements release after release. But it takes a lot of time, and it caps our ambition when it comes to development. ... [so] We're thinking about changing that and adopting a longer development cycle."

The updates are installed onto a different (and isolated) system image or subvolume. Once the update finishes successfully, you can switch to the new system by rebooting. Again, if the update isn't 100% successful, it will not happen. And because this all occurs on a separate partition (or image), you don't have to worry about it affecting your system's current state.

You probably have heard people say things like "Enable swap if your system is crashing" or "Swap makes your machine slow" or "Enable swap if app is dying with OOM" So in this article, let's talk about swap memory, what it is, how to enable it, how to check if it's running, how it's different from virtual memory,