You can switch your existing Linux installation from X11 to Wayland without reinstalling anything. The migration boils down to selecting a Wayland session at your display manager’s login screen, then working through three categories of follow-up: Xwayland compatibility for legacy X11 applications, input device configuration via libinput instead of xorg.conf, and environment variable tweaks so that toolkits like Qt, GTK, and Electron render natively through Wayland instead of falling back to X11. Most people can finish the whole process in an afternoon, keeping an X11 session as a fallback until they are satisfied everything works.

Hardening a Docker image means cutting the attack surface at every layer. Start from a minimal base like distroless or Alpine. Run as a non-root user. Set the filesystem read-only. Drop all Linux capabilities and add back only what the app needs. Pin dependency versions with checksums. Scan images with Trivy or Grype before you push. Each layer of this checklist stands on its own, so you can adopt them one at a time.

If you have ever handed a new team member a README full of “install Node 22, then Python 3.12, then make sure your openssl headers match” instructions, you already know the problem. Nix flakes solve it at the root: instead of documenting what to install, you declare the exact toolchain in a flake.nix file, commit it alongside your code, and every developer runs nix develop to get an identical environment - same compiler, same CLI versions, same system libraries. In 2026, Nix flakes are stable, the Nixpkgs repository holds over 100,000 packages, and the ecosystem around flakes has matured to the point where the learning curve is manageable even for teams with no prior Nix experience.

Run Traefik v3 as a Docker container to build a production-ready stack. It discovers services through Docker labels and handles Let’s Encrypt TLS certificates automatically. You won’t need separate Nginx configs because everything lives in one docker-compose.yml file. This setup gives you a self-managing reverse proxy for multi-service deployments.

The current stable release as of early 2026 is Traefik v3.6.x, with v3.7 in early access. All examples in this guide target the v3.x line.

Tmux already handles pane splitting and window management well enough out of the box, but most people stop there. The real productivity gains come from treating tmux as infrastructure: scripting your session layouts so a single command rebuilds your entire development environment, persisting sessions across reboots so you never lose context, and installing plugins that add clipboard integration, fuzzy finding, and pattern matching to your workflow. With tmux 3.6a (the current stable release) and a handful of well-chosen plugins, your terminal becomes something closer to a persistent, scriptable IDE than a simple multiplexer.

A wildcard SSL cert for *.example.com from Let’s Encrypt covers every one-level subdomain. You get one through the DNS-01 challenge, or, since February 2026, through the new DNS-PERSIST-01 challenge that skips per-renewal DNS edits. One wildcard cert replaces the per-service certs you’d otherwise juggle behind your reverse proxy.

Why Wildcard Certificates and When You Need Them

If you run three subdomains, single certs work fine. Each one gets its own HTTP-01 challenge, Certbot handles renewal, and life is simple. Once you pass 10 or 15 subdomains, the chore list grows. Every new service needs its own cert request, its own renewal entry, and its own way to break. A wildcard cert folds all of that into one.