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Linux Server Admin with Fexingo: Sysadmin, Bash, and Server Engineering

Linux Server Admin with Fexingo: Sysadmin, Bash, and Server Engineering

By: Fexingo
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Lucas and Luna sit down at a pair of thin laptops, terminal windows flickering with abstract patterns, to talk Linux server administration as it's actually practiced—bash scripting, systemd quirks, Nginx tuning, SSH hardening, and the daily grind of keeping production services online. Each episode picks a single sysadmin problem: how to diagnose a slow database query without panic, why that cron job keeps failing at 3 AM, or the right way to automate backups with rsync and rclone. Lucas brings the journalistic rigor—he'll cite real-world incidents like the 2021 AWS Kinesis outage that broke monitoring for half the internet, or the time a misplaced chmod command took down a major e-commerce site for an hour. Luna pushes back with hands-on experience: she's the one who asks whether you really need Docker for a three-service stack, or why your fail2ban config is banning your own IP. Together they cut through vendor hype—no Kubernetes if you have five servers, no Ansible if a shell loop will do—and focus on the tools and habits that keep systems boringly stable. The listener is someone who manages servers—maybe a solo IT generalist at a mid-size company, a DevOps engineer tired of conference talk, or a hobbyist running a home lab who wants professional-grade discipline. No whiteboarding abstract architectures; just concrete decisions, error messages, and the trade-offs between uptime and complexity. Can you afford to ignore SELinux? When is it smarter to reboot than to debug a memory leak? And how do you explain a 99.9% uptime SLA to a manager who thinks 'the cloud' fixes everything? #LinuxServerAdmin #Sysadmin #Bash #ServerEngineering #SSH #Nginx #Systemd #DevOps #Infrastructure #Automation #Backup #Security #Technology #FexingoBusiness #BusinessPodcast #DailyPodcast #ServerRoom #Terminal Keep every episode free: buymeacoffee.com/fexingo© 2026 Fexingo. All rights reserved. Economics
Episodes
  • Linux Server SSH Hardening with Security Keys

    Linux Server SSH Hardening with Security Keys
    Jun 15 2026
    In this episode, Lucas and Luna dive into the practical steps for hardening SSH on Linux servers using FIDO2/U2F security keys. They explain why password and even key-based authentication often fall short, then walk through the setup: generating a key backed by a hardware token, configuring sshd to accept only ed25519-sk keys, and disabling password login. The conversation covers real-world friction points like handling multiple servers, backup authentication methods, and the surprising lesson one sysadmin learned after locking themselves out. By the end, listeners have a concrete, implementable security upgrade for their own infrastructure. #Linux #SSH #SecurityKeys #FIDO2 #U2F #Sysadmin #ServerHardening #Ed25519 #Cybersecurity #Authentication #OpenSSH #Technology #FexingoBusiness #BusinessPodcast #ServerAdmin #InfrastructureSecurity #SSHConfig #HardwareToken Keep every episode free: buymeacoffee.com/fexingo
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    10 mins
  • How to Use Linux BPF for Real-Time Performance Tracing

    How to Use Linux BPF for Real-Time Performance Tracing
    Jun 14 2026
    Episode 51 of Linux Server Admin with Fexingo dives into BPF (Berkeley Packet Filter) as a practical tool for real-time performance tracing on Linux servers. Hosts Lucas and Luna walk through a concrete scenario: diagnosing a mysterious latency spike in a web application without restarting or installing new packages. Lucas explains how bpftrace lets you attach one-liners to kernel probes to measure disk I/O, syscall latency, and scheduling delays, using real examples like tracing ext4 file operations and identifying a slow NFS server. The episode covers the difference between classic BPF and eBPF, common one-liners for sysadmins, and safety mechanisms that prevent crashes. Listeners learn how BPF can replace older tools like strace for production use by being safer and more efficient. The hosts also touch on how to check if your kernel supports BPF and where to find pre-built tools like BCC. Perfect for server admins who want deeper observability without overhead. #Linux #BPF #eBPF #PerformanceTracing #Sysadmin #Bpftrace #Kernel #Observability #ServerManagement #LinuxPerformance #BCC #Troubleshooting #Technology #FexingoBusiness #BusinessPodcast #ServerEngineering #DevOps #RealTimeMonitoring Keep every episode free: buymeacoffee.com/fexingo
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    13 mins
  • How to Use Linux Namespaces for Process Isolation

    How to Use Linux Namespaces for Process Isolation
    Jun 14 2026
    In episode 50 of Linux Server Admin with Fexingo, Lucas and Luna dive into Linux namespaces for process isolation, focusing on the PID and network namespaces. They walk through real commands — unshare, nsenter, ip netns — to show how to create isolated environments without Docker. Lucas shares a story about using namespaces to run a legacy application in isolation on a production server, avoiding the overhead of full containerization. They also cover how to inspect existing namespaces and common pitfalls like namespace leaks. Perfect for sysadmins who want lightweight isolation without pulling in container runtimes. Tune in for practical, copy-paste-ready commands. #Linux #Namespaces #ProcessIsolation #Sysadmin #Bash #ServerEngineering #ContainerSecurity #Unshare #Nsenter #PIDNamespace #NetNS #Tech #Podcast #FexingoBusiness #BusinessPodcast #DevOps #Infrastructure #SystemAdministration Keep every episode free: buymeacoffee.com/fexingo
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    13 mins
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