Update instructions with new apt key.

See https://developer.nvidia.com/blog/updating-the-cuda-linux-gpg-repository-key/ for details.

Author: nluehr

site/en/install/gpu.md

@@ -93,15 +93,14 @@ This section shows how to install CUDA® 11 (TensorFlow >= 2.4.0) on Ubuntu
 Caution: [Secure Boot](https://wiki.ubuntu.com/UEFI/SecureBoot){:.external}
 complicates installation of the NVIDIA driver and is beyond the scope of these instructions.
 
-
-#### Ubuntu 18.04 (CUDA 11.0)
+#### Ubuntu 18.04 (CUDA 11.2)
 
 <pre class="prettyprint lang-bsh">
 # Add NVIDIA package repositories
-<code class="devsite-terminal">wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-ubuntu1804.pin</code>
-<code class="devsite-terminal">sudo mv cuda-ubuntu1804.pin /etc/apt/preferences.d/cuda-repository-pin-600</code>
-<code class="devsite-terminal">sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/7fa2af80.pub</code>
-<code class="devsite-terminal">sudo add-apt-repository "deb https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/ /"</code>
+# Note: For Ubuntu version other than 18.04 or CPU arch other than x86,
+# replace 'ubuntu1804' and/or 'x86_64' as needed in the following URL.
+<code class="devsite-terminal">wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-keyring_1.0-1_all.deb</code>
+<code class="devsite-terminal">sudo dpkg -i cuda-keyring_1.0-1_all.deb</code>
 <code class="devsite-terminal">sudo apt-get update</code>
 
 # Install development and runtime libraries (~4GB)
@@ -114,19 +113,18 @@ complicates installation of the NVIDIA driver and is beyond the scope of these i
     libnvinfer-plugin8=8.2.4-1+cuda11.4 \
     libnvinfer-plugin-dev=8.2.4-1+cuda11.4
 </code>
+
 # Reboot. Check that GPUs are visible using the command: nvidia-smi
 </pre>
 
-#### Ubuntu 16.04 (CUDA 11.0)
+#### Ubuntu 16.04 (CUDA 11.2)
 
 <pre class="prettyprint lang-bsh">
 # Add NVIDIA package repositories
-# Add HTTPS support for apt-key
-<code class="devsite-terminal">sudo apt-get install gnupg-curl</code>
-<code class="devsite-terminal">wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/cuda-ubuntu1604.pin</code>
-<code class="devsite-terminal">sudo mv cuda-ubuntu1604.pin /etc/apt/preferences.d/cuda-repository-pin-600</code>
-<code class="devsite-terminal">sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/7fa2af80.pub</code>
-<code class="devsite-terminal">sudo add-apt-repository "deb https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/ /"</code>
+<code class="devsite-terminal">sudo apt-get update</code>
+<code class="devsite-terminal">sudo apt-get install -y <apt-transport-https/code>
+<code class="devsite-terminal">wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/cuda-keyring_1.0-1_all.deb</code>
+<code class="devsite-terminal">sudo dpkg -i cuda-keyring_1.0-1_all.deb</code>
 <code class="devsite-terminal">sudo apt-get update</code>
 
 # Install development and runtime libraries (~4GB)