[SOLVED] Revert CHMOD 666 cmd for Docker

Issue

I've installed Docker on an Ubuntu Server 18.04.

I received permissions error when trying to run docker commands, so I run this command:

sudo chmod 666 /var/run/docker.sock

Now I found that the tidy solution is to follow next steeps:

• Create the docker group.

sudo groupadd docker

• Add your user to the docker group.

sudo usermod -aG docker ${USER}

• You would need to loog out and log back in so that your group membership is re-evaluated or type the following command:

su -s ${USER}

As I'm new with Linux management, I'm not sure on how to revert the last chmod command.

Is there a way to do it?

Solution

The default permissions on /var/run/docker.sock is generally owned by user root and group docker, with mode 0660 (read/write permissions for owner and group, no permissions for others).

sudo chmod 0660 /var/run/docker.sock

Remember that anyone who can run any docker command at all can trivially root the host

docker run --rm -it -v /:/host busybox vi /host/etc/sudoers

For a development system adding your normal user to the docker group might be acceptable; if you have actual production-oriented data on the system, requiring sudo might be more appropriate.

Answered By - David Maze

Answer Checked By - Senaida (WPSolving Volunteer)