DEV Community: Dev888 AUGUST

Managing Docker Containers: docker ps, stop and remove 🐳

Dev888 AUGUST — Wed, 17 Sep 2025 11:31:11 +0000

In the last post, we ran our very first container with docker run hello-world.

But how do we see which containers are running? And how do we manage them?

That’s where docker ps comes in.

👀 List containers with `docker ps`

Run:

docker ps

This shows all running containers.
You’ll see columns like:

CONTAINER ID → unique ID for the container
IMAGE → which image it came from
STATUS → running time
PORTS → which ports are exposed
NAMES → an auto-generated (or custom) name

📜 Show all containers (including stopped)

By default, docker ps only shows running containers.
To see all, use:

bash docker ps -a

This will list containers that have already exited too.

🛑 Stop a container

If you want to stop a running container:

bash docker stop <container_id_or_name>

Example:

bash docker stop funny_panda

❌ Remove a container

Stopped containers still take up space.
To remove them:

bash docker rm <container_id_or_name>

Example:

bash docker rm funny_panda

🧹 Clean up all stopped containers

To remove all stopped containers at once:

bash docker container prune

Docker will ask for confirmation before deleting.

🚀 Summary

docker ps → list running containers
docker ps -a → list all containers (running + stopped)
docker stop → stop a container
docker rm → remove a container
docker container prune → clean up everything stopped

💡 Next: we’ll explore Docker Images — how to list, pull, and remove them.

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Docker Basics: Image vs Container 🐳

Dev888 AUGUST — Thu, 11 Sep 2025 11:16:06 +0000

Docker Basics: Image vs Container 🐳

When you start learning Docker, one of the first confusions is:

what is the difference between an Image and a Container?

Let’s break it down with a simple analogy.

📖 Image = Recipe

Think of an image as a recipe.

It tells you what ingredients you need and how to cook them.
It defines everything your app needs: code, dependencies, environment.
But on its own, you can’t use it.
A recipe is not food — just like an image is not a running app.

🍝 Container = Dish

Now imagine actually cooking the recipe.

The container is the dish prepared from the recipe.
It’s real, it exists, you can eat it (or run it).
That’s your app actually running, isolated from the rest of your system.

👉 One Recipe → Many Dishes

The beauty of Docker is that:

You can take one image (recipe).
And create many containers (dishes).
Each container runs independently, even if they come from the same image.

Example:

docker run nginx:latest
docker run nginx:latest

Here you just launched two containers from the same image (nginx).

🚀 Why it matters

Images are blueprints.

Containers are the actual running apps.

This distinction helps you understand how Docker scales apps and why you can run multiple containers from the same image.

💡 Next step: let’s actually run our first container with:

docker run hello-world

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What is Docker? Explained Simply 🐳

Dev888 AUGUST — Wed, 10 Sep 2025 07:14:35 +0000

Have you ever struggled installing Node, Postgres, or Redis on every new machine?

Docker solves this problem by putting everything inside a magic box.

🐳 What is Docker?

Docker is a platform that lets you package your app and its dependencies into something called a container.

This container runs the same way on your laptop, your teammate’s computer, or a cloud server.

📦 Image vs Container (simple analogy)

Image = recipe 📖

Instructions of what to build and how.
Container = dish 🍝

The actual running instance of your app.

👉 One image (recipe) can create many containers (dishes).

❌ Without Docker

Install Node, Postgres, Redis…
Handle versions, configs, environments.
On a new machine → repeat everything.

✅ With Docker

One command to build an image.
Run it as a container anywhere.
Your app works the same everywhere.

🚀 Why it matters

Consistency: “Works on my machine” disappears.
Portability: move apps between laptops, servers, or clouds easily.
Speed: no more long setup steps.

💡 Next: we’ll dive into the difference between an image and a container in detail.

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DEV Community: Dev888 AUGUST

Managing Docker Containers: docker ps, stop and remove 🐳

👀 List containers with docker ps

📜 Show all containers (including stopped)

🛑 Stop a container

❌ Remove a container

🧹 Clean up all stopped containers

🚀 Summary

Docker Basics: Image vs Container 🐳

📖 Image = Recipe

🍝 Container = Dish

👉 One Recipe → Many Dishes

What is Docker? Explained Simply 🐳

🐳 What is Docker?

📦 Image vs Container (simple analogy)

❌ Without Docker

✅ With Docker

🚀 Why it matters

👀 List containers with `docker ps`