I followed your instruction and went to the download site, went into ..focal/pool/stable/ location.

There are a multitude of packages listed there.

As per your article, “download .deb file of the version of docker engine you want to install”.

Dude, I downloaded one deb file which was the latest date, I did ‘docker –version‘ which worked fine, but to my surprise when I did ‘sudo docker run hello-world‘ it says docker engine not running!!

I thought, how, I just installed it as per your instruction, and wasted my time doing different commands. then from the docker docs, I saw YOU NEED TO DOWNLOAD MULTIPLE FILES FROM DOWNLOAD SITE AND THEN INSTALL EACH OF THEM.

Dude, you didn’t even explain how many files (s) to download and install!!

You mentioned “download .deb FILE“, see singular.!!

So:

1. I removed my docker installation with the remove docker instructions given at the beginning.
2. I ran the script again and it failed promptly with GPG errors. So figured the removal might not have been complete, and sure enough, there was a hidden folder .docker still present which I deleted, and for good measure, I deleted the get-docker.sh.
3. I got a fresh copy of the script. and tried again. This time I had execution privileges problems with the script. I recalled that I had had the same problem the first time through, and corrected it with chmod a+x.
4. Finally, the script ran as it should.

I am not certain that what I did was proper, but I can proceed now. This script is great. In the process I explored the other two methods without success: With the first method, I kept having problems with GPG errors and so moved on to Method 2. where I was unable to find the .deb file you referred to. So I moved on to method 3, where I had success.

That absolutely solved it! Why wasn’t it in the tutorial? I would have been lost without this comment.

@bobkarr,

just open the terminal and type this command to fix it…

$ sudo chmod 666 /var/run/docker.sock

As a day-1 Linux Mint user (with no previous Linux experience), I’ve been rather impressed that this distro meets & often exceeds my previous Windows experience.

Unfortunately, my self-taught CLI lessons have been less than stellar; at a rate of probably 20%, I run into errors after eliminating syntax issues, spelling, etc.

Having followed the tutorial all the way through the “groupadd” section, I attempt to run the su-less “hello-world” command in docker & am met with:

docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post “http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/create”: dial unix /var/run/docker.sock: connect: permission denied.
See ‘docker run –help’.

Previous CLI obstacles I’ve encountered have almost always been either incorrect permissions or generating terminal commands from the wrong directory. I suspect the former is the case here after a perusal of the error message. However, I don’t know what directory or file requires permission or what permission it requires (x would be my guess).