Linux服务器上安装CUDA11.2和对应的cuDNN 8.4.0

一、检查

检查本机是否有CUDA工具包，输入nvcc -V:

如图所示，服务器上有CUDA，但版本为9.1.85，版本过低，因此博主要重装一个新的。

二、安装CUDA

1.查看服务器最高支持的CUDA版本

在命令行输入nvidia-smi查看显卡驱动版本也就是最高支持的CUDA工具包版本。
例如，本机可安装11.7及以下的CUDA工具包：

2.官网下载CUDA安装包

在NVIDIA官网选择对应版本的CUDA工具包并选择你的机器配置，我们就选择11.2.0版本下载

在终端执行如下命令：

wget https://developer.download.nvidia.com/compute/cuda/11.2.0/local_installers/cuda_11.2.0_460.27.04_linux.run
sudo sh cuda_11.2.0_460.27.04_linux.run

3.安装CUDA

如果出现以下提示，选择continue并在下面取消安装驱动即可。

根据提示一步步安装，手动输入accept确认。

我们已经有驱动了，这里取消安装驱动，上下键跳转选项，回车键选择是否安装。

因为我服务器上之前安装过CUDA12，所以会出现这个提示。它表示已经找到了一个现有的CUDA Toolkit 11.2安装，并询问用户是否要升级所有组件或者选择要升级的组件。如果用户不想继续安装，可以选择"No, abort installation"来中止安装过程。我这里选择选择Upgrade all

稍作等待，出现以下提示信息就安装好了，可以看到CUDA安装到了/usr/local/cuda-11.2/

注意看提示 make sure that: 意思是要添加环境变量

4.配置环境变量

输入如下指令查看PATH和LD_LIBRARY_PATH中环境变量

echo $PATH

echo $LD_LIBRARY_PATH

查看有无添加上述两个环境变量，若无，则采用如下两种方法添加环境变量

法1：直接运行export命令定义变量【只对当前shell（BASH）有效（临时的）】

export PATH=$PATH:/usr/local/cuda-11.2/bin

export LD_LIBRARY_PATH=/usr/local/cuda-11.2/lib64

法二：在用户目录下的.bashrc文件中增加变量【（永久的）】

sudo vim ~/.bashrc

点i进入编辑模式，在最后一行输入

export PATH=$PATH:/usr/local/cuda-11.2/bin
export LD_LIBRARY_PATH=/usr/local/cuda-11.2/lib64

输入好了按Esc退出编辑模式，然后输入:wq 保存退出就好

保存好了之后注意，这个时候如果查看环境变量会发现还是没有添加好的，所以我们需要更新一下bashrc文件。更新指令如下：

source ~/.bashrc

输入nvcc -V查看cuda版本

图示为安装成功。

我出现的问题：

安装了新的cuda后nvcc -V依然显示旧版本

输入nvcc -V任显示旧版本的v9.1

但查看环境路径却已经配好

解决办法是：
1.执行sudo apt-get remove nvidia-*卸载原驱动。
2.这时候nvcc -V就会显示下方的图片的错误。

3.下载驱动

输入下条命令，查看你的显卡驱动所使用的内核版本

cat /proc/driver/nvidia/version

可以看出内核版本为515.105.01

输入下条命令，查看电脑驱动

cat /var/log/dpkg.log | grep nvidia

2022-05-22 06:24:13 upgrade libnvidia-common-470:all 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:24:13 status half-configured libnvidia-common-470:all 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:24:14 configure libnvidia-common-470:all 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:24:14 status unpacked libnvidia-common-470:all 470.129.06-0ubuntu0.18.04.1
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2022-05-22 06:24:14 status installed libnvidia-common-470:all 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:25:58 upgrade nvidia-driver-460:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:25:58 status half-configured nvidia-driver-460:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:25:58 configure nvidia-driver-460:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:25:58 status unpacked nvidia-driver-460:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:25:59 status half-configured nvidia-driver-460:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:25:59 status installed nvidia-driver-460:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:30:36 upgrade nvidia-driver-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:30:36 status half-configured nvidia-driver-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:30:37 upgrade libnvidia-gl-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
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2022-05-22 06:31:01 upgrade libnvidia-gl-470:i386 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
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2022-05-22 06:31:05 upgrade nvidia-dkms-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:31:05 status half-configured nvidia-dkms-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:31:39 upgrade nvidia-kernel-source-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:31:39 status half-configured nvidia-kernel-source-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:31:44 upgrade libnvidia-decode-470:i386 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
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2022-05-22 06:31:45 upgrade libnvidia-decode-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
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2022-05-22 06:31:46 upgrade libnvidia-compute-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
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2022-05-22 06:31:52 status half-configured libnvidia-compute-470:i386 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:31:56 upgrade libnvidia-extra-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:31:56 status half-configured libnvidia-extra-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:31:57 upgrade nvidia-compute-utils-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:31:57 status half-configured nvidia-compute-utils-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:31:58 upgrade libnvidia-encode-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:31:58 status half-configured libnvidia-encode-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:31:58 upgrade libnvidia-encode-470:i386 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:31:58 status half-configured libnvidia-encode-470:i386 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:31:59 upgrade nvidia-utils-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:31:59 status half-configured nvidia-utils-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:31:59 upgrade xserver-xorg-video-nvidia-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:31:59 status half-configured xserver-xorg-video-nvidia-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:32:00 upgrade libnvidia-ifr1-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:00 status half-configured libnvidia-ifr1-470:amd64 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:32:01 upgrade libnvidia-ifr1-470:i386 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:01 status half-configured libnvidia-ifr1-470:i386 470.103.01-0ubuntu0.18.04.1
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2022-05-22 06:32:02 upgrade libnvidia-fbc1-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
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2022-05-22 06:32:02 status unpacked libnvidia-fbc1-470:amd64 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:02 status half-configured libnvidia-fbc1-470:i386 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:02 status half-installed libnvidia-fbc1-470:amd64 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:02 status half-installed libnvidia-fbc1-470:amd64 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:02 status unpacked libnvidia-fbc1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:02 status unpacked libnvidia-fbc1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:02 upgrade libnvidia-fbc1-470:i386 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:02 status half-configured libnvidia-fbc1-470:i386 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:02 status unpacked libnvidia-fbc1-470:i386 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:02 status half-installed libnvidia-fbc1-470:i386 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:02 status half-installed libnvidia-fbc1-470:i386 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:03 status unpacked libnvidia-fbc1-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:03 status unpacked libnvidia-fbc1-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:03 upgrade libnvidia-cfg1-470:amd64 470.103.01-0ubuntu0.18.04.1 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:03 status half-configured libnvidia-cfg1-470:amd64 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:03 status unpacked libnvidia-cfg1-470:amd64 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:03 status half-installed libnvidia-cfg1-470:amd64 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:03 status half-installed libnvidia-cfg1-470:amd64 470.103.01-0ubuntu0.18.04.1
2022-05-22 06:32:03 status unpacked libnvidia-cfg1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:03 status unpacked libnvidia-cfg1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:03 configure nvidia-kernel-common-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:03 status unpacked nvidia-kernel-common-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:03 status half-configured nvidia-kernel-common-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status installed nvidia-kernel-common-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 configure libnvidia-gl-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:30 status unpacked libnvidia-gl-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status half-configured libnvidia-gl-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status installed libnvidia-gl-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 configure libnvidia-gl-470:i386 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:30 status unpacked libnvidia-gl-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status half-configured libnvidia-gl-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status installed libnvidia-gl-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 configure libnvidia-fbc1-470:i386 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:30 status unpacked libnvidia-fbc1-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status half-configured libnvidia-fbc1-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status installed libnvidia-fbc1-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 configure libnvidia-fbc1-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:30 status unpacked libnvidia-fbc1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status half-configured libnvidia-fbc1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 status installed libnvidia-fbc1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:30 configure libnvidia-compute-470:i386 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:30 status unpacked libnvidia-compute-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status half-configured libnvidia-compute-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status installed libnvidia-compute-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 configure libnvidia-compute-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:31 status unpacked libnvidia-compute-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status unpacked libnvidia-compute-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status half-configured libnvidia-compute-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status installed libnvidia-compute-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 configure libnvidia-cfg1-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:31 status unpacked libnvidia-cfg1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status half-configured libnvidia-cfg1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status installed libnvidia-cfg1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 configure libnvidia-ifr1-470:i386 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:31 status unpacked libnvidia-ifr1-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status half-configured libnvidia-ifr1-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status installed libnvidia-ifr1-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 configure libnvidia-ifr1-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:31 status unpacked libnvidia-ifr1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status half-configured libnvidia-ifr1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status installed libnvidia-ifr1-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 configure xserver-xorg-video-nvidia-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:31 status unpacked xserver-xorg-video-nvidia-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status half-configured xserver-xorg-video-nvidia-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status installed xserver-xorg-video-nvidia-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 configure libnvidia-extra-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:31 status unpacked libnvidia-extra-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status half-configured libnvidia-extra-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status installed libnvidia-extra-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 configure nvidia-kernel-source-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:31 status unpacked nvidia-kernel-source-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:31 status half-configured nvidia-kernel-source-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 status installed nvidia-kernel-source-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 configure nvidia-utils-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:32 status unpacked nvidia-utils-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 status half-configured nvidia-utils-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 status installed nvidia-utils-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 configure libnvidia-decode-470:i386 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:32 status unpacked libnvidia-decode-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 status half-configured libnvidia-decode-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 status installed libnvidia-decode-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 configure libnvidia-decode-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:32 status unpacked libnvidia-decode-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 status half-configured libnvidia-decode-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 status installed libnvidia-decode-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 configure nvidia-dkms-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:32:32 status unpacked nvidia-dkms-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:32:32 status half-configured nvidia-dkms-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 status installed nvidia-dkms-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 configure nvidia-compute-utils-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:35:03 status unpacked nvidia-compute-utils-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 status half-configured nvidia-compute-utils-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 status installed nvidia-compute-utils-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 configure libnvidia-encode-470:i386 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:35:03 status unpacked libnvidia-encode-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 status half-configured libnvidia-encode-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 status installed libnvidia-encode-470:i386 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 configure libnvidia-encode-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:35:03 status unpacked libnvidia-encode-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 status half-configured libnvidia-encode-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 status installed libnvidia-encode-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:03 configure nvidia-driver-470:amd64 470.129.06-0ubuntu0.18.04.1 <无>
2022-05-22 06:35:03 status unpacked nvidia-driver-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:04 status half-configured nvidia-driver-470:amd64 470.129.06-0ubuntu0.18.04.1
2022-05-22 06:35:04 status installed nvidia-driver-470:amd64 470.129.06-0ubuntu0.18.04.1

可以看到由470.103.01升级到了515.105.01

输入下条命令，查看电脑所有驱动

sudo dpkg --list | grep nvidia-*

卸载现有驱动，重新安装

sudo /usr/bin/nvidia-uninstall
sudo apt-get --purge remove nvidia-*
sudo apt-get purge nvidia*
sudo apt-get purge libnvidia*

其中第二行可能会出现：

那就按他说的做

sudo apt autoremove nvidia-*

直到命令不输出任何内容

sudo dpkg --list | grep nvidia-*

查找可用的驱动版本

ubuntu-drivers devices

那我就安装515吧，带有server的是针对没有图形化界面的服务器的。

重新安装

sudo apt-get install nvidia-driver-515 nvidia-settings nvidia-prime

3.然后按照安装cuda的步骤安装后再nvcc -V就可以显示安装的cuda版本信息。

三、安装cuDNN

1.根据安装的CUDA工具包版本在官网选择适合版本的cuDNN，本文安装的CUDA版本是11.2，就选择与之对应的cuDNN v8.4.0，选择Local Installer for Linux x86_64 (Tar)。

2. 复制cuDNN库的链接，使用wget下载或者下载到自己电脑之后再传到服务器上。

我的服务器网速有点慢，所以选择先下到自己电脑再传上去，速度很快啊。

3.解压cuDNN文件，并进入解压出的文件夹，拷贝文件到/usr/local/cuda-11.2中

	tar -xvf cudnn-linux-x86_64-8.4.0.27_cuda11.6-archive.tar.xzcd cudnn-linux-x86_64-8.4.0.27_cuda11.6-archivesudo cp lib/* /usr/local/cuda-11.2/lib64/sudo cp include/* /usr/local/cuda-11.2/include/sudo chmod a+r /usr/local/cuda-11.2/lib64/*sudo chmod a+r /usr/local/cuda-11.2/include/*

查看cuDNN版本，旧版本指令为cat /usr/local/cuda/include/cudnn.h | grep CUDNN_MAJOR -A2，新版本有更新，将cuDNN版本信息单拉了一个文件名为cudnn_version.h，所以新版本查看cuDNN版本的命令为cat /usr/local/cuda/include/cudnn_version.h | grep CUDNN_MAJOR -A 2