```shell
wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2404/x86_64/cuda-keyring_1.1-1_all.deb
sudo dpkg -i cuda-keyring_1.1-1_all.deb
sudo apt-get update
sudo apt-get -y install cuda-toolkit-12-8
sudo apt-get install -y cuda-drivers
```

```shell
nvidia-smi
```

```
sudo grep -r "mirrors.tuna.tsinghua.edu.cn" /etc /usr 2>/dev/null
```

```shell
nvcc -V
```

```
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/pool/restricted/l/linux-restricted-modules/linux-objects-nvidia-570-6.8.0-63-generic_6.8.0-63.66+3_amd64.deb  403  Forbidden [IP: 101.6.15.130 80]
E: Failed to fetch http://mirrors.tuna.tsinghua.edu.cn/ubuntu/pool/restricted/l/linux-restricted-signatures/linux-signatures-nvidia-6.8.0-63-generic_6.8.0-63.66+3_amd64.deb  403  Forbidden [IP: 101.6.15.130 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

```

```
(base) root@ss-IdeaPad-PC:/etc/apt/sources.list.d# cat ubuntu.sources 
Types: deb
URIs: http://cn.archive.ubuntu.com/ubuntu/
Suites: noble noble-updates noble-backports
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

Types: deb
URIs: http://security.ubuntu.com/ubuntu
Suites: noble-security
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
```