I was quite comfortable running my docker using sudo, not that I preferred it but I really had no option until I had to run a CI/CD pipeline which throws error as a result of running the commands with sudo. By default, the docker command can only be run by the root user or by a user in the docker group, which is automatically created during Docker’s installation process. If you attempt to run the docker command without prefixing it with sudo or without being in the docker group, you’ll get an output like this:
Output
docker: Cannot connect to the Docker daemon. Is the docker daemon running on this host?.
See 'docker run --help'.
This made me further troubleshoot to get a solution, this article is about my little experience resolving the issue, most especially if you experience this issue running docker on a server.
I ran my docker on an EC2 instance, even after following the commands necessary for me to run docker without using sudo. It turns out I had to reboot my server, and not just exit the terminal and ssh back in to the terminal as a lot of articles I came across advised. Well, that may have worked for others, but it did not for me. If it's on a local terminal, after following the process, you can close your terminal and come back in. The changes would be effected, but it's not so for servers, you have to reboot the server.
Also, I'd like to add that it is important you run docker without sudo especially in a Jenkins Job as it would throw errors as seen below.
If you want to avoid typing sudo whenever you run the docker command, add your username to the docker group. That being said, the following are steps to run Docker without sudo(I'd still like to emphasize, for EC2 servers or any other cloud provider servers,):
-
Add your username to the docker group:
sudo usermod -aG docker ${USER} Apply the new group membership. In my own case, I had to reboot my ec2 server for it to take effect, my server user had no password. If your user has a password, then run
su - ${USER}. You'd be prompted to enter your password, do that and the changes would take effect.Confirm that your user is now added to the docker group by running the command
groups. You should now see your user amongts the group.
That's all, you can now go ahead and run docker without sudo. This worked for me and my Jenkins job which failed worked right after the above steps
Top comments (10)
Thanks for sharing this! I ran into the same issue while setting up my CI/CD pipeline. Rebooting the server actually did the trick for me too—something most tutorials didn’t mention. Really appreciate the clear explanation, especially the Jenkins tip. Italian Brainrot Saved me hours!
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This is a super practical guide! Setting up Docker to run without sudo on an EC2 server definitely makes managing containers way smoother and more secure. I appreciate how you broke down the steps clearly—it reminds me of how Pelota Libre TV fine-tunes its backend systems to ensure smooth streaming without unnecessary friction. Have you noticed any performance improvements or security benefits after making this switch?
Absolutely relate to your experience! I remember facing a similar issue when setting up Docker for a school project that involved creating a backend for a multiplayer Slope Game. At first, I always used sudo out of habit, but when configuring CI/CD pipelines, the permissions became a real hurdle. Adding myself to the docker group finally fixed things, and it was such a relief. Docker permissions really can trip you up if you’re not careful!
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Great walkthrough—removing the need for sudo with Docker on EC2 really streamlines dev workflows. I ran into similar permission challenges when automating container setups for a side project over at bitlifeapkmods.com/. This guide clarified a few things I had missed. Thanks!
Great walkthrough! Running Docker without sudo definitely streamlines workflows, especially on EC2 instances where automation matters. I faced similar permission challenges while optimizing deployments for apps like carxstreetsmodapk.com/ this post really clarified the group/user adjustments. Thanks for sharing!
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