卸载cuda 9.0sudo apt-get --purge remove cudasudo apt autoremoveto remove cuda 9.0Thensudo apt-get cleanto clear apt-cache安装8.0sudo dpkg -i cuda-repo-ubuntu1604-8-0-local-ga2_8.0.61-1_amd64.debsudo apt-get updatesudo apt-get install cuda-8-0