清华镜像源安装cuda12.1

您可以按照以下步骤在清华镜像源上安装CUDA 12.1：

1. 添加清华镜像源到apt源列表中：

   sudo echo "deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse" >> /etc/apt/sources.list
   sudo echo "deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse" >> /etc/apt/sources.list
   sudo echo "deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse" >> /etc/apt/sources.list
   sudo echo "deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse" >> /etc/apt/sources.list

2. 添加清华镜像源的GPG key：

   sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32

3. 更新apt源列表：

   sudo apt-get update

4. 安装CUDA 12.1：

   sudo apt-get install cuda-12-1

5. 验证CUDA是否安装成功：

   nvcc -V