Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.

在安装Docker以后，执行命令出现错误。

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/json": dial unix /var/run/docker.sock: connect: permission denied

解决办法

1. 添加当前用户到docker组

sudo gpasswd -a $USER docker

2. 更新dokcer组

newgrp docker

3. 重启docker（可选，如何执行完以上命令仍无法解决问题）

sudo systemctl restart docker