Install Docker under Ubuntu 18.04 [pro-test available]

1. Follow this tutorial to see (after reading a lot, it doesn't work, this is currently available)

Docker Lite Getting Started (ubuntu16.04+) Installation (1) Develop Paper

When testing hello-world in the last step, this error will be reported

 After consulting the relevant information, it is a question of permissions. I passed the

sudo su privilege escalation and then docker run hello-world , or directly sudo docker run hello-world

References

Docker encountered problems Got permission denied while trying to connect to the Docker daemon socket_luffy5459's blog - CSDN blog