Ubuntu16.4:Got permission denied while trying to connect to the Docker daemon socket

在输入命令的过程中一直报错：
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.40/containers/mysql8.0/json: dial unix /var/run/docker.sock: connect: permission denied
原因是我登陆的ubutun账号不是root，所以执行命令启动某个东西的时候一直抱着个错，
后来把命令前面价格sudo 之后就可以了