Let's talk about how to shut down Docker on Ubuntu

Docker is a popular containerization service that helps developers build, package and deploy applications more easily. Although Docker is extremely useful during development and deployment, there are times when you may need to turn it off. In this article, we will explain how to turn off Docker on Ubuntu.

Step 1: Determine the status of Docker

First we need to determine whether Docker is running or has stopped. We can use the following command to check the status of Docker:

sudo systemctl status docker

If Docker is running, you will see the following output:

● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2019-04-26 14:35:32 CST; 13h ago
     Docs: https://docs.docker.com
 Main PID: 12629 (dockerd)
    Tasks: 16
   Memory: 45.2M
   CGroup: /system.slice/docker.service
           ├─12629 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
           ├─12651 docker-containerd --config /var/run/docker/containerd/containerd.toml
           ├─18741 docker-containerd-shim -namespace moby -workdir /var/lib/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/99aa9b57e8d8f11e68f36bbc92b54d90eda8c81375268cc...               ├─18806 /usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port 80 -container-ip 172.17.0.4 -container-port 80
           └─18817 /usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port 443 -container-ip 172.17.0.4 -container-port 443

If Docker has stopped running, you will see the following output:

● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Fri 2019-04-26 12:01:07 CST; 17h ago
     Docs: https://docs.docker.com
 Main PID: 10423 (code=exited, status=0/SUCCESS)

Step 2: Shut down Docker

If Docker is running, we can use the following command to stop Docker:

sudo systemctl stop docker

If you encounter problems, you can try to force kill Dead Docker process:

sudo killall docker

Step 3: Disable Docker

If you wish to disable Docker after restarting the system, you can use the following command:

sudo systemctl disable docker

At this point, you have succeeded Closed Docker. If you need to restart Docker, you can use the following command:

sudo systemctl start docker

If you need to configure it to run automatically, you can use the following command:

sudo systemctl enable docker

Summary

In this article, We covered how to turn off Docker on Ubuntu. If you have unfinished tasks, be sure to save your work before closing Docker. Shutting down Docker is a simple but important process to ensure your system is in a secure state. If you have any questions, please feel free to contact our support team.

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