Ubuntu 16.04，原始cuda版本8.0，安装cuda 10.0后，使用nvcc --version查询，显示cuda仍为8.0
ubuntu@zhangli:/usr/local$ nvcc --version nvcc: NVIDIA (R) Cuda compiler driver Copyright (c) 2005-2016 NVIDIA Corporation Built on Tue_Jan_10_13:22:03_CST_2017 Cuda compilation tools, release 8.0, V8.0.61
但使用cat查询，显示为10.0
ubuntu@zhangli:/usr/local$ cat /usr/local/cuda/version.txt CUDA Version 10.0.130
使用stat cuda查询，同样显示软链接已链到10.0
ubuntu@zhangli:/usr/local$ stat cuda File: ‘cuda‘ -> ‘/usr/local/cuda-10.0‘ Size: 20 Blocks: 0 IO Block: 4096 symbolic link Device: 811h/2065d Inode: 2902997 Links: 1 Access: (0777/lrwxrwxrwx) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2019-04-30 15:23:34.587721331 +0800 Modify: 2019-04-30 15:22:00.913838239 +0800 Change: 2019-04-30 15:22:00.913838239 +0800 Birth: -
解决方法：将bashrc文件中的cuda的8.0改为10.0，再source一下，就ok了
ubuntu@zhangli:/usr/local$ sudo gedit ~/.bashrc # 改为10.0 export PATH=/usr/local/cuda-8.0/bin${PATH:+:${PATH}} export LD_LIBRARY_PATH=/usr/local/cuda-8.0/lib64${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}} ubuntu@zhangli:/usr/local$ source ~/.bashrc
原文：https://www.cnblogs.com/laosan007/p/12612446.html