ubuntu18.04版本安装流程：

wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-ubuntu1804.pin
sudo mv cuda-ubuntu1804.pin /etc/apt/preferences.d/cuda-repository-pin-600
sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/7fa2af80.pub
sudo add-apt-repository "deb https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/ /"
sudo apt-get update

sudo apt install libnccl2=2.8.4-1+cuda11.1 libnccl-dev=2.8.4-1+cuda11.1

libnccl其他版本：

cuda10.2：

sudo apt install libnccl2=2.9.6-1+cuda10.2 libnccl-dev=2.9.6-1+cuda10.2

cuda10.1：

sudo apt install libnccl2=2.4.8-1+cuda10.1 libnccl-dev=2.4.8-1+cuda10.1

cuda10.0：

sudo apt install libnccl2=2.4.8-1+cuda10.0 libnccl-dev=2.4.8-1+cuda10.0

ubuntu20.04版本安装流程：

wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/cuda-ubuntu2004.pin
sudo mv cuda-ubuntu2004.pin /etc/apt/preferences.d/cuda-repository-pin-600
sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/7fa2af80.pub
sudo add-apt-repository "deb https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/ /"
sudo apt-get update

sudo apt install libnccl2=2.8.4-1+cuda11.1 libnccl-dev=2.8.4-1+cuda11.1

RedHat/CentOS 8版本安装流程：

sudo dnf config-manager --add-repo https://developer.download.nvidia.com/compute/cuda/repos/rhel8/x86_64/cuda-rhel8.repo

 sudo yum install libnccl-2.8.4-1+cuda11.1 libnccl-devel-2.8.4-1+cuda11.1 libnccl-static-2.8.4-1+cuda11.1

RedHat/CentOS 7安装流程：

sudo yum-config-manager --add-repo https://developer.download.nvidia.com/compute/cuda/repos/rhel7/x86_64/cuda-rhel7.repo

sudo yum install libnccl-2.8.4-1+cuda11.1 libnccl-devel-2.8.4-1+cuda11.1 libnccl-static-2.8.4-1+cuda11.1

注意：以上均需要注意自己电脑上cuda版本，以免安装错误版本导致出现问题。