使用runfile安装cuda出现如下错误

sudo sh cuda_11.2.0_460.27.04_linux.run

nvidia-installer log file '/var/log/nvidia-installer.log'
creation time: Tue Jun 29 11:06:31 2021
installer version: 460.27.04

PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin

nvidia-installer command line:
    ./nvidia-installer
    --ui=none
    --no-questions
    --accept-license
    --disable-nouveau
    --no-cc-version-check
    --install-libglvnd

Using built-in stream user interface
-> Detected 80 CPUs online; setting concurrency level to 32.
-> The file '/tmp/.X0-lock' exists and appears to contain the process ID '1911' of a running X server.
ERROR: You appear to be running an X server; please exit X before installing.  For further details, please see the section INSTALLING THE NVIDIA DRIVER in the README available on the Linux driver download page at www.nvidia.com.
ERROR: Installation has failed.  Please see the file '/var/log/nvidia-installer.log' for details.  You may find suggestions on fixing installation problems in the README available on the Linux driver download page at www.nvidia.com.

解决方法

sudo /etc/init.d/lightdm stop
sudo /etc/init.d/lightdm status

参考：https://www.cnblogs.com/chua-n/p/13208398.html