Linux

Want to test a build on Ubuntu 24.04 while running Arch? Want CUDA 12.x on a stable Debian host without touching the host drivers? Want six Node.js versions that don’t fight each other? Distrobox is the shortest path there. It’s a POSIX shell wrapper around Podman , Docker , or Lilipod . The containers feel like native shells, and they run just as smoothly inside a terminal built for instant redraws as on a plain console. Your home directory, Wayland socket, GPU, SSH keys, Git config, and audio all wire in for you. GUI apps you install inside show up in the host menu.

sched_ext (SCX) is a Linux kernel framework that lets you implement CPU schedulers in eBPF and hot-swap them at runtime without rebooting or recompiling the kernel. It merged into mainline in Linux 6.12 and matured through 7.0, which tightened its interaction with the default EEVDF class. On any distro shipping a kernel with CONFIG_SCHED_CLASS_EXT=y, loading a new scheduler takes a single command, for example sudo scx_loader --start scx_lavd, and you confirm it is active by reading /sys/kernel/sched_ext/root/ops.

Build a solid systemd service by writing a .service unit file in /etc/systemd/system/ with [Unit], [Service], and [Install] sections, then enable it with systemctl enable --now. Add resource caps, security sandboxing, and auto-restart so the service stays up. Then use journalctl and systemd-analyze security to debug it. Systemd v260 is the current stable release, and it ships on every major distro.

Why Systemd Unit Files Beat Init Scripts

Many developers still write shell wrapper scripts to run their apps. A 30-line bash script juggles PID files, log setup, restarts, and privilege drops. That’s a lot of code just to keep one process alive. A systemd unit file replaces all of it with a short, declarative config, often under 20 lines.

Thirty days of COSMIC Desktop 1.0 on Pop!_OS 24.04 LTS, and I am keeping it. Switch if you are a keyboard-first developer who wants a real tiling-plus-floating hybrid, appreciates Rust-grade stability, and likes a UI that sits under 900 MB at idle. Wait a release or two if you depend on a big GNOME extension collection, niche input methods (CJK/IBus edge cases), or a heavy accessibility stack. The COSMIC Store’s catalog is still smaller than Flathub’s GNOME Circle or the KDE offerings, and only a handful of third-party cosmic-ext-* applets exist in 2026. Everyone else should at least boot the live ISO before deciding. COSMIC 1.0 is the first new Linux desktop in a decade that does not feel like a fork of something older.

Picking a self-hosted database in 2026 comes down to one question: when does it force you to migrate? SQLite holds until about one write-heavy app server (~10 GB, single writer). PostgreSQL 18 is the default that almost never makes you move. MariaDB 12.3 LTS earns its spot mainly when you already live in the MySQL world.

What are the best self-hosted databases for web apps in 2026?

For a self-hosted web app, three engines cover almost every case: PostgreSQL is the do-everything default, SQLite is the embedded single-file engine, and MariaDB is the MySQL-compatible community fork. All three are open source and free to run on your own box.

eBPF (extended Berkeley Packet Filter) lets you attach tiny sandboxed programs to kernel events: syscalls, network packets, scheduler decisions, and filesystem calls. You collect detailed performance data in real time. No kernel source changes, no custom modules, no service restarts. With bpftrace one-liners and the BCC toolkit, you can measure per-process disk latency, trace TCP connections, profile CPU hotspots, and find memory leaks on production Linux. Overhead is usually under 2%.