# Install CUDA


## 公式ページが最強
CUDA のアーカイブでインストールしたいバージョンを選択  
[https://developer.nvidia.com/cuda-toolkit-archive](https://developer.nvidia.com/cuda-toolkit-archive)

Platform の選択
<img src="./img/install_cuda_0.png" class="img-align1">

指示通り，コマンドを実行する．  
dev をダウンロードするので，temp フォルダなどを作るとファイル整理しやすい  
<img src="./img/install_cuda_1.png" class="img-align1">

(推奨)バージョン指定する（指定しない場合は最新のCUDAになる）
```diff bash
- $ sudo apt-get -y install cuda
+ $ sudo apt install cuda-12-1
```

再起動
```bash
$ reboot
```

PATHを通す
```bash
$ echo "export PATH=/usr/local/cuda/bin:$PATH" >> ~/.bashrc
$ echo "export LD_LIBRARY_PATH=/usr/local/cuda/lib64:$LD_LIBRARY_PATH" >> ~/.bashrc
```

Terminalの再起動か設定ファイルのリロード
```bash
$ source ~/.bashrc
```

インストールの確認
```bash
$ nvcc -V
```


## Troubleshooting
１．`apt install cuda` で以下のエラー
```bash
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 nvidia-kernel-common-535 : Conflicts: nvidia-kernel-common
 nvidia-kernel-common-545 : Conflicts: nvidia-kernel-common
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
```
`apt install nvidia-kernel-common-535` をしても以下のエラー
```bash
Unpacking nvidia-kernel-common-535 (535.129.03-0ubuntu1) over (535.129.03-0ubuntu0.22.04.1) ...
dpkg: error processing archive /var/cache/apt/archives/nvidia-kernel-common-535_535.129.03-0ubuntu1_amd64.deb (--unpack):
 trying to overwrite '/lib/firmware/nvidia/535.129.03/gsp_ga10x.bin', which is also in package nvidia-firmware-535-535.129.03 535.129.03-0ubuntu0.22.04.1
dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/nvidia-kernel-common-535_535.129.03-0ubuntu1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
```

**解決方法**  
エラーメッセージ通り，dev パッケージを上書きする
```bash
$ sudo dpkg -i --force-overwrite /var/cache/apt/archives/nvidia-kernel-common-535_535.129.03-0ubuntu1_amd64.deb
$ sudo apt -f install
$ sudo apt update
```