Cannot Connect to the Docker Daemon: Is the Docker Daemon Running?

Cannot Connect to the Docker Daemon: Is the Docker Daemon Running?

Digital World Gadgets

The situation where you are unable to connect to the Docker daemon, and you have this message “Cannot connect to the Docker daemon. Is the Docker daemon running?”

is quite common when interacting with Docker on your system. In this guide, I will show you how to resolve this issue and be able to use Docker. This nail-biting mistake is Docker’s greatest head-scratcher and makes users constantly ask themselves why Docker is not being cooperative. So, in the ensuing article, you will read about the Docker daemon, its importance, some significant reasons for its unavailability, and some quick-fix tips to make it run effortlessly.

Introduction of  the Docker Daemon

Docker is the Docker daemon, which is also referred to as docked. It forms the backbone of the Docker engine. In short, it creates, removes, defines policies for, and protects containers, images, networks, and volumes.

This daemon acts as a container where the Docker application layer and the Docker API engage, but mostly, commands are initiated and carried out to do container operations.

Common Causes of Connection Issues:

Daemon Not Started:

One of the most evident reasons for this problem is when no Docker daemon is installed, and there is no way to communicate, thus adding a layer of difficulty to carrying out the task. It can occur for several reasons, including, in particular, a daemon freeze, a system restart, or manually closing the process.

Permissions Issue:

A shortage of rights prevents the Docker clients from communicating with the daemon, which also leads to connection failures. The Docker group membership and using sudo with Docker commands are the most significant causes of this problem.

Daemon Crashed:

If the Docker daemon faces a fallback due to a daemon crash or an error, it may respond corrupted, leading to such an issue with the connection. This could occur with any of the mentioned challenges, such as limited resources, conflicting software, or Docker bugs.

Networking Problems:

Enough this way, edge→ switches are specific, but they could be a network configuration, firewall setting, or proxy setting that prevents a client from communicating with the Docker daemon. Settings errors, e.g., misconfigured IP addresses, dumbed ports, or DNS resolution issues, are fostered here.

Troubleshooting and Solutions:

Check Docker Daemon Status:

The first step in troubleshooting the connection problem is to check the Docker daemon’s status. By utilizing this command, you can find out where the docker process is running, whether the service is up and running or not, and even find out the cause of any problems it may encounter by running the command sudo systemctl status docker. If your daemonument is not running, you may start it using sudo systemctl docker run, which means you will start it using admin privileges or root privileges.

Verify Docker installation:

Run the docker command in your system and verify that Docker is correctly installed by the Docker –version. If Docker is not installed, then, looking into the official Docker Installation guides, installing it correctly is your job.

Review Permissions:

The first step is to ensure that your user account is authenticated with permission to engage with Docker properly. Make a member of your user in the Docker group using the command “sudo usermod -aG docker $USER” and then exit and log in again for the changes to get permission.

Restart Docker Service:

Occasionally, after the Docker service is restarted, all the connection problems are also gone. You may achieve this by running the command ‘sudo systemctl restart docker.’ Once started, this command will stop and restart the Docker daemon, a process that could make it easier to identify and resolve problems.


Having encountered a problem when using the Docker application, you try to connect the Docker daemon and are faced with the message “Cannot connect to the Docker daemon.” It is frustrating, but you can make several diagnoses to get Docker up and running again. Additionally, we will discover popular reasons and problems encountered with connection issues and provide practical solutions to use Docker’s capabilities effectively. Take proper scheduling for Docker daemon status checking, granting sufficient permissions, and maintaining the network configurations to deal with future impediments of connectivity. While it’ll take some dedication and a smattering of aptitude, you’ll have mastered the art of using Docker containers to store and maintain your applications securely in a few days.


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