The Linux Podcast with Fexingo: Open Source Operating Systems, Distros, and Server Stack

Fexingo
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Lucas and Luna examine the Linux ecosystem as it powers everything from cloud servers to embedded devices. They trace the evolution of major distributions — Fedora's upstream-first philosophy, Debian's stability-first governance, and the commercial strategies behind Ubuntu and RHEL — without rehashing release notes. Each episode picks one layer of the stack: the container runtime that changed deployment (Docker, Podman), the systemd debate, or why Wayland still hasn't fully replaced X11 on the desktop. They also cover real-world migrations: a startup moving from CentOS to Rocky Linux, a government agency choosing OpenSUSE Leap for long-term support, and the kernel patching workflow at a FAANG-scale datacenter. Lucas brings the command-line fluency — package managers, filesystem hierarchy, SELinux contexts — while Luna asks the questions that matter to sysadmins and developers: What breaks when you upgrade? How do you audit a distro's supply chain? Can Linux ever win the desktop without OEM deals? No fanboy evangelism, no terminal-porn demos. Listeners come for the technical depth — kernel config options, Wayland protocols, cgroups v2 — but stay for the operational judgment: which distro for a Kubernetes node, which init system for an embedded device. What does it take to run Linux at scale without burning out your ops team? #Linux #OpenSource #Technology #FexingoBusiness #BusinessPodcast #Distro #Kernel #Containerization #Docker #Podman #Systemd #Wayland #RHEL #Ubuntu #Fedora #Debian #Sysadmin #DevOps Keep every episode free: buymeacoffee.com/fexingo

  1. 2h ago

    How Linux F2FS Optimises Flash Storage for Modern Devices

    In this episode, Lucas and Luna explore F2FS, the flash-friendly file system designed by Samsung for NAND storage. They explain why traditional file systems like ext4 struggle with SSDs, how F2FS uses a log-structured design to reduce write amplification, and the role of multi-head logging and adaptive algorithms in improving performance and longevity. They also discuss real-world adoption, from Android smartphones to enterprise SSDs, and weigh the trade-offs of using F2FS for your own projects. Perfect for developers, sysadmins, and anyone curious about the technology behind their devices. #F2FS #LinuxFileSystem #FlashStorage #SSD #NAND #Samsung #OpenSource #Kernel #Technology #SysAdmin #DevOps #StorageOptimization #WriteAmplification #LogStructured #Android #FexingoBusiness #BusinessPodcast #Linux Keep every episode free: buymeacoffee.com/fexingo

    How Linux F2FS Optimises Flash Storage for Modern Devices

  2. 1d ago

    How Linux Kernel Samepage Merging Reduces Memory Waste

    In this episode of The Linux Podcast with Fexingo, Lucas and Luna dig into Kernel Samepage Merging (KSM) — the Linux kernel feature that deduplicates identical memory pages across processes. They explain how KSM works, why it matters for virtualization and container workloads, and where it can actually hurt performance. Using the classic example of multiple virtual machines running the same guest OS, they break down the trade-offs between memory savings and CPU overhead. They also touch on practical tuning: when to enable KSM, how to monitor its effectiveness with tools like ksmctl, and why it's often disabled by default in modern hypervisors like KVM. This episode gives you a concrete mental model of memory deduplication in Linux, plus a few real-world considerations for your own servers. #Linux #Kernel #KSM #MemoryManagement #Virtualization #KVM #Containers #Docker #SystemAdministration #DevOps #ServerStack #OpenSource #Technology #FexingoBusiness #BusinessPodcast #CloudComputing #MemoryDeduplication #LinuxPerformance Keep every episode free: buymeacoffee.com/fexingo

    How Linux Kernel Samepage Merging Reduces Memory Waste

  3. 2d ago

    How Linux io_uring and eBPF Transform Network Performance

    In episode 158 of The Linux Podcast with Fexingo, Lucas and Luna dig into the real-world impact of combining io_uring with eBPF for high-speed networking. They unpack how these two kernel technologies work together to slash latency and boost throughput, using the example of a hypothetical CDN edge server handling millions of requests. The conversation covers the mechanics of both systems, the challenges of integration, and practical advice for developers looking to experiment. They also touch on the broader trend of kernel-bypass alternatives and why io_uring and eBPF are becoming the go-to for performance-critical applications. A concrete, accessible look at cutting-edge Linux internals. #Linux #io_uring #eBPF #Networking #Kernel #Performance #Technology #OpenSource #CDN #XDP #SysAdmin #DevOps #Cloud #Server #FexingoBusiness #BusinessPodcast #TechPodcast #LinuxPodcast Keep every episode free: buymeacoffee.com/fexingo

    How Linux io_uring and eBPF Transform Network Performance

  4. 3d ago

    How Linux eBPF Observes Every Packet in Real Time

    Lucas and Luna dive into eBPF, the kernel technology that lets you trace network packets and system calls without adding any overhead. They start with a concrete example: using bpftrace to answer a question that would normally take hours of digging through tcpdump logs. Along the way, they explain what eBPF is, why it's a game-changer for observability, how it compares to older tools like tcpdump and strace, and why the Linux kernel can run these programs safely. They also touch on how companies like Netflix and Facebook use eBPF in production, and what that means for anyone running a server today. If you've ever wanted to see inside your kernel, this episode gives you the perfect entry point. #eBPF #Linux #Observability #Kernel #Bpftrace #Networking #SysAdmin #DevOps #Performance #Trace #FexingoBusiness #Technology #OpenSource #LinuxKernel #CloudNative #Troubleshooting #PacketAnalysis #Security Keep every episode free: buymeacoffee.com/fexingo

    How Linux eBPF Observes Every Packet in Real Time

  5. 4d ago

    How Linux io_uring and XDP Combine for High-Speed Networking

    Episode 156 of Fexingo's Linux podcast dives into the rare but powerful pairing of io_uring and XDP for high-speed networking. Lucas and Luna explain how io_uring's asynchronous I/O model meets eXpress Data Path's early packet processing, cutting latency and CPU overhead in demanding server workloads. They use a concrete example from a typical cloud gateway, walk through the mechanics of both technologies, and discuss where the combination shines—and where it doesn't. If you've wondered how modern Linux handles millions of packets per second without melting the CPU, this episode gives you the mental model and the pitfalls to watch. No fluff, just the technical details that matter for sysadmins, developers, and anyone running network-heavy services. #LinuxNetworking #io_uring #XDP #HighPerformanceComputing #ServerTech #NetworkStack #AsyncIO #Kernel #SysAdmin #DevOps #CloudInfrastructure #PacketProcessing #Technology #OpenSource #FexingoBusiness #BusinessPodcast #TechPodcast #LinuxPerformance Keep every episode free: buymeacoffee.com/fexingo

    How Linux io_uring and XDP Combine for High-Speed Networking

  6. 5d ago

    How Linux Bcache Caches Block Devices for Speed

    Episode 155 of The Linux Podcast dives into Bcache, the Linux kernel block-layer caching that lets you put a fast SSD in front of slow spinning disks. Lucas and Luna walk through how Bcache works at the block level, why it's different from filesystem-level caching, and where it shines—like speeding up database storage or home lab NAS builds without ripping out existing drives. They break down the key concepts: caching modes (writeback, writethrough, writearound), the bucket and priority cache structure, and how to attach a cache device to a backing device. They also touch on real-world performance numbers, like how Bcache can slash read latency from tens of milliseconds to under a millisecond for hot data, and discuss the trade-offs, including writeback risks and the importance of a UPS. The episode wraps with a look at Bcachefs, the next-gen filesystem that builds on Bcache's ideas, and a practical tip for anyone considering Bcache in their own setup. If you've ever wanted to squeeze more life out of old hard drives, this is the episode for you. #Bcache #Linux #BlockCaching #SSD #HDD #Storage #Kernel #Filesystem #Bcachefs #NAS #HomeLab #Performance #Writeback #Writethrough #Technology #OpenSource #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo

    How Linux Bcache Caches Block Devices for Speed

  7. 6d ago

    How Linux Control Groups Handle Thousands of Containers

    In this episode of The Linux Podcast with Fexingo, Lucas and Luna dig into the inner workings of Linux Control Groups, or cgroups, and how they keep modern containerized systems stable. Using a real-world example of a platform running ten thousand containers on a single host, they explain how cgroups manage CPU, memory, and I/O resources to prevent one runaway process from taking down the whole system. They walk through the difference between cgroups version one and version two, and why version two's unified hierarchy is a game changer for managing resources across large fleets. Lucas also highlights the delicate interplay between cgroups and the OOM killer, and how systemd integrates cgroups to make container orchestration safer. The conversation stays practical, touching on how engineers can monitor cgroup metrics with tools like systemd-cgls and the ps command, and what happens when limits are set too tight or too loose. If you've ever wondered how a single kernel feature keeps massive container deployments from collapsing, this episode gives you a clear, grounded explanation. Tune in for a deep but accessible look at a foundational Linux technology. #Linux #ControlGroups #Cgroups #Containers #Systemd #Kernel #ResourceManagement #ServerAdministration #DevOps #Virtualization #OOMKiller #ProcessIsolation #Technology #OpenSource #FexingoBusiness #BusinessPodcast #TechPodcast #SysAdmin Keep every episode free: buymeacoffee.com/fexingo

    How Linux Control Groups Handle Thousands of Containers

  8. Aug 13

    How Linux Control Groups Manage Container Resources

    In this episode, Lucas and Luna dive into cgroups v2, the kernel feature that underpins container resource management. They explain how cgroups limit CPU, memory, and I/O for individual processes, and how systemd integrates with cgroups to manage services. The conversation covers the shift from cgroups v1 to v2, the role of cgroups in container runtimes like Docker and Kubernetes, and a practical example of setting memory limits. They also touch on why cgroups matter for security and multi-tenant environments. If you've ever wondered how your containers stay within their resource bounds, this episode breaks it down with clarity and real-world context. #Linux #Cgroups #Containers #Docker #Kubernetes #Systemd #Kernel #ResourceManagement #CPU #Memory #IO #Virtualization #DevOps #CloudNative #Technology #FexingoBusiness #BusinessPodcast #OpenSource Keep every episode free: buymeacoffee.com/fexingo

    How Linux Control Groups Manage Container Resources
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About

Lucas and Luna examine the Linux ecosystem as it powers everything from cloud servers to embedded devices. They trace the evolution of major distributions — Fedora's upstream-first philosophy, Debian's stability-first governance, and the commercial strategies behind Ubuntu and RHEL — without rehashing release notes. Each episode picks one layer of the stack: the container runtime that changed deployment (Docker, Podman), the systemd debate, or why Wayland still hasn't fully replaced X11 on the desktop. They also cover real-world migrations: a startup moving from CentOS to Rocky Linux, a government agency choosing OpenSUSE Leap for long-term support, and the kernel patching workflow at a FAANG-scale datacenter. Lucas brings the command-line fluency — package managers, filesystem hierarchy, SELinux contexts — while Luna asks the questions that matter to sysadmins and developers: What breaks when you upgrade? How do you audit a distro's supply chain? Can Linux ever win the desktop without OEM deals? No fanboy evangelism, no terminal-porn demos. Listeners come for the technical depth — kernel config options, Wayland protocols, cgroups v2 — but stay for the operational judgment: which distro for a Kubernetes node, which init system for an embedded device. What does it take to run Linux at scale without burning out your ops team? #Linux #OpenSource #Technology #FexingoBusiness #BusinessPodcast #Distro #Kernel #Containerization #Docker #Podman #Systemd #Wayland #RHEL #Ubuntu #Fedora #Debian #Sysadmin #DevOps Keep every episode free: buymeacoffee.com/fexingo

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