Episodes

  • How Linux BPF Is Supercharging Network Performance

    How Linux BPF Is Supercharging Network Performance
    Jun 29 2026
    Episode 80 of The Linux Podcast dives into how eBPF is revolutionizing network performance beyond just replacing kernel modules. Lucas and Luna explore a specific case: Cloudflare using eBPF to handle DDoS mitigation at line rate, processing millions of packets per second without touching userspace. They break down the BPF virtual machine, its verifier safety guarantees, and why companies like Netflix and Meta are now running eBPF in production to shave microseconds off latency. The episode also touches on the emerging bpfilter project as a potential iptables replacement. If you've heard eBPF buzz but never understood the concrete wins, this episode gives you the numbers and the architecture. #eBPF #BPF #Cloudflare #Netflix #Meta #LinuxKernel #NetworkPerformance #DDOS #bpfilter #iptables #VirtualMachine #Verifier #Latency #Technology #LinuxPodcast #FexingoBusiness #BusinessPodcast #OpenSource Keep every episode free: buymeacoffee.com/fexingo
    Show More Show Less
    9 mins
  • How Linux Fanotify Is Revolutionizing File Change Monitoring

    How Linux Fanotify Is Revolutionizing File Change Monitoring
    Jun 28 2026
    In this episode, Lucas and Luna explore Fanotify, the Linux kernel's file change notification system that is replacing tools like inotify for modern workloads. They break down how Fanotify monitors entire filesystems at once instead of individual files, making it ideal for antivirus scanners, backup tools, real-time replication, and systemd-journald. Lucas explains the key difference from inotify—no per-watch memory and no path walking—using a concrete example of monitoring a container's overlay filesystem. Luna brings up the practical costs: Fanotify requires root privileges, and it can still flood user-space with events if not throttled. The episode also covers the fanotify manpage, fanotify_mark() system call, and how features like FAN_OPEN_PERM enable policy-based access decisions. They wrap with a look at the future: the FAN_RENAME flag in Linux 6.0 and how Fanotify handles mount namespaces for containers. Perfect for anyone building infrastructure that needs near-real-time filesystem awareness. #Fanotify #Linux #FileChangeMonitoring #Inotify #Kernel #Filesystem #SystemAdministration #DevOps #ContainerSecurity #Antivirus #BackupTools #RealTimeReplication #Systemd #Linux6.0 #OpenSource #Technology #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
    Show More Show Less
    8 mins
  • Why the Linux Kernel Is Now Written in Rust

    Why the Linux Kernel Is Now Written in Rust
    Jun 28 2026
    Episode 78 dives into the biggest programming language shift in Linux history: Rust code inside the kernel. Lucas explains why the C language's memory-safety bugs have caused decades of security patches, and how Rust's compile-time guarantees eliminate entire classes of vulnerabilities at the source. He walks through the key milestones: the 2022 merge of initial Rust support, the first Rust network driver in 2024, and the current state as of mid-2026 where over 2.5 million lines of Rust now ship in mainline Linux. Luna asks about the learning curve for kernel maintainers and whether Rust will ever fully replace C. The hosts discuss the biggest real-world payoff so far—a filesystem module with zero reported memory bugs in production—and what's next for Rust in subsystems like scheduling and memory management. If you've wondered whether Linux is quietly undergoing a generational rewrite, this episode gives you the concrete numbers and the human story behind the transition. #Linux #Rust #Kernel #MemorySafety #CLanguage #OpenSource #LinuxKernel #Programming #SystemsProgramming #SoftwareEngineering #Security #Technology #FexingoBusiness #BusinessPodcast #Podcast #LinusTorvalds #RustForLinux #MiguelOjeda Keep every episode free: buymeacoffee.com/fexingo
    Show More Show Less
    9 mins
  • How Linux Flatpak Is Reshaping Desktop Application Distribution

    How Linux Flatpak Is Reshaping Desktop Application Distribution
    Jun 27 2026
    Lucas and Luna explore how Flatpak is changing the way Linux users install and run desktop applications. They trace the project's origins at Red Hat, its use of bubblewrap for sandboxing, and the controversial relationship with Flathub as a centralized store. The episode explains why Flatpak appeals to developers seeking a stable runtime target and to users wanting newer apps without distro upgrades. They also compare Flatpak's approach to Snap and AppImage, highlighting tradeoffs in sandbox tightness, startup time, and repository control. A concrete example: how the Freedesktop SDK 23.08 runtime lets an app like GIMP run untouched across Fedora, Ubuntu, and Arch. The hosts discuss friction with GNOME's libadwaita theming and the ongoing debate about who should control the app-store layer. For listeners wondering whether to use Flatpak or distro-native packages, this episode offers a clear, specific framework. #Flatpak #LinuxDesktop #ContainerLinux #Sandbox #Flathub #Bubblewrap #GNOME #Freedesktop #AppDistribution #RedHat #Ubuntu #Fedora #ArchLinux #Snap #AppImage #Technology #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
    Show More Show Less
    6 mins
  • How Linux Cgroups Are Taming Server Resource Chaos

    How Linux Cgroups Are Taming Server Resource Chaos
    Jun 27 2026
    Lucas and Luna dive into Linux control groups (cgroups) — the kernel feature that underlies container resource limits, systemd service isolation, and cloud cost optimization. They trace cgroups from Google engineer Paul Menage's 2006 patch to today's v2 unified hierarchy, using Netflix's 2024 migration to cgroupsv2 as a case study. You'll learn how cgroups prevent noisy-neighbor problems in shared servers, why CPU and memory cgroups work differently than I/O cgroups, and how a single misconfigured cgroup can silently waste $50,000 a month in cloud spend. Essential for anyone running containers, multi-tenant systems, or Linux servers in production. #Linux #Cgroups #ControlGroups #ContainerIsolation #ResourceManagement #Kernel #Systemd #Netflix #CloudCostOptimization #NoisyNeighbors #Cgroupsv2 #PaulMenage #ServerEfficiency #Technology #FexingoBusiness #BusinessPodcast #LinuxPodcast #OpenSource Keep every episode free: buymeacoffee.com/fexingo
    Show More Show Less
    12 mins
  • How Linux VFIO Is Powering GPU Passthrough for VMs

    How Linux VFIO Is Powering GPU Passthrough for VMs
    Jun 26 2026
    In this episode of The Linux Podcast, Lucas and Luna explore VFIO (Virtual Function I/O), the Linux kernel framework enabling near-native GPU passthrough to virtual machines. They break down how VFIO uses IOMMU groups to isolate devices, explain the difference between mediated and direct passthrough, and discuss real-world use cases from gaming VFIO setups to cloud GPU instances. Specific numbers: a single GPU passthrough can achieve 97% of bare-metal performance in benchmarks like Unigine Heaven. They also touch on the challenges of resetting NVIDIA consumer cards and how vendor SR-IOV support is evolving. Whether you're a sysadmin looking to optimize cloud GPU workloads or a hobbyist building a dual-boot-free gaming VM, this episode gives you the concrete mechanics behind VFIO. #Linux #VFIO #GPU #Passthrough #Virtualization #IOMMU #SR-IOV #KVM #QEMU #NVIDIA #AMD #Cloud #Gaming #Technology #FexingoBusiness #BusinessPodcast #OpenSource #SysAdmin Keep every episode free: buymeacoffee.com/fexingo
    Show More Show Less
    7 mins
  • How Linux Auditd Is Reinventing Compliance Monitoring

    How Linux Auditd Is Reinventing Compliance Monitoring
    Jun 26 2026
    Episode 74 of The Linux Podcast dives into auditd, the Linux audit framework that's quietly becoming essential for compliance teams. Lucas and Luna explore how auditd records system calls, file accesses, and authentication events to meet standards like PCI DSS and SOC 2. They break down a real-world example: a mid-sized SaaS company that used auditd to detect a compromised SSH key within minutes, avoiding a data breach. The episode covers configuring audit rules, understanding audit logs, and integrating with tools like Auditbeat for centralised monitoring. Listeners walk away knowing why auditd is not just for security teams but for anyone running a production Linux server. #Linux #Auditd #Compliance #SecurityMonitoring #PCIDSS #SOC2 #SystemCalls #AuditRules #Logging #Auditbeat #SSH #SaaS #DevOps #Sysadmin #RegulatoryCompliance #Technology #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
    Show More Show Less
    12 mins
  • How Linux io_uring Accelerates Database Performance

    How Linux io_uring Accelerates Database Performance
    Jun 25 2026
    Lucas and Luna dive into how the io_uring asynchronous I/O framework is transforming database performance on Linux. They use the concrete example of PostgreSQL 17, which saw a 30% latency reduction on high-throughput workloads after adopting io_uring for WAL writes. The conversation explores how io_uring eliminates the syscall overhead that plagued traditional AIO and libaio, what this means for NVMe storage, and why application developers need to think differently about submission queues and completion rings. Lucas explains the concept of 'kernel bypass' without giving up security, and Luna asks whether io_uring will eventually make traditional syscalls obsolete. They also cover the real-world benchmarks from Cloudflare and Meta, and the trade-offs for smaller deployments. A brief, natural donation segment threads into the discussion about open-source efficiency. #Linux #io_uring #PostgreSQL #DatabasePerformance #AsynchronousIO #Kernel #NVMe #Cloudflare #Meta #OpenSource #Technology #FexingoBusiness #BusinessPodcast #LinuxPerformance #Syscall #Storage #Benchmark #WAL Keep every episode free: buymeacoffee.com/fexingo
    Show More Show Less
    9 mins