Add Linux fresh setup toolkit

labs/linux/setup/docs/nvidia.md

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+# NVIDIA Tooling
+
+## Diagnostic-only default
+
+The normal NVIDIA profile installs `nvtop`, `clinfo`, and PCI utilities. It
+does not install or select a driver:
+
+```bash
+sudo ./install.sh --nvidia-tools
+```
+
+Review hardware and current module state:
+
+```bash
+lspci -nn | grep -i nvidia
+nvidia-smi
+dkms status
+mokutil --sb-state
+```
+
+## Explicit driver installation
+
+Install only a reviewed Ubuntu driver package version:
+
+```bash
+sudo ./install.sh --install-nvidia-driver 550
+```
+
+The numeric value maps directly to `nvidia-driver-VERSION`. The profile refuses
+an unavailable package. Reboot after installation, then validate `nvidia-smi`,
+kernel logs, DKMS state, and application behavior.
+
+## Selection considerations
+
+- GPU generation and supported driver branch.
+- Ubuntu release, kernel, and HWE stack.
+- Secure Boot module enrollment.
+- CUDA or application compatibility.
+- Docker NVIDIA Container Toolkit requirements.
+- Whether the device will be bound to VFIO instead of the host driver.
+
+## Troubleshooting
+
+```bash
+journalctl -k | grep -Ei 'nvidia|nouveau|NVRM'
+lsmod | grep -E 'nvidia|nouveau'
+dkms status
+apt-cache policy 'nvidia-driver-*'
+```
+
+Driver rollback is environment-specific and is not automated. Preserve console
+access and a known-good kernel before changing GPU or Secure Boot configuration.