permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fd dial unix /var/run/docker.sock: connect: permission denied

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/images/json": dial unix /var/run/docker.sock: connect: permission denied

[liujiaxin01@PC1 home]$ ll /var/run/docker.sock     ## root和docker用户组有权限

[liujiaxin01@PC1 home]$ echo $USER
liujiaxin01
[liujiaxin01@PC1 home]$ sudo gpasswd -a $USER docker
[sudo] password for liujiaxin01:
Adding user liujiaxin01 to group docker

[liujiaxin01@PC1 ~]$ docker image ls