WSL2 Ubuntu administration from the Linux side. Profile-aware - reads preferences from
the shared Windows-side profile at /mnt/c/Users/{WIN_USER}/.admin/profiles/{hostname}.json.
Use when: apt packages, Docker containers, Python/uv in WSL, Node in WSL, shell configs
(.bashrc/.zshrc), systemd services in WSL, SSH from WSL to servers.
NOT for: .wslconfig changes (use admin-windows), Windows packages (use admin-windows),
native Linux/macOS (use admin-unix).
Keywords: wsl, wsl2, ubuntu, apt, docker, /mnt/c, wslpath, systemd wsl, python wsl, node wsl