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Marzena Pugo
Marzena Pugo

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Working with Containers on Linux: Docker & Podman Made Simple

Table of Contents


Why Containers? The Real-World Benefits

Let’s face it: deploying apps on Linux can get messy. Containers solve that.

  • Consistency: Run your app the same way everywhere-dev, test, prod

  • Isolation: No more “it works on my machine” headaches

  • Portability: Move containers across clouds and servers with ease

  • Speed: Spin up and tear down environments in seconds


Docker Basics: The Industry Standard

Docker has been the go-to for containers since 2013.

  • What it does: Packages your app and its dependencies into a single,
    portable image.

  • Core components:

    • Docker Engine (runs containers)
    • Docker CLI (your main tool)
    • Docker Hub (public image registry)
  • Why people love it:

    • Huge community and tons of pre-built images
    • Easy to get started, even for beginners


Podman: The New Kid with Serious Advantages

Podman is Docker’s younger, security-focused sibling.

  • Daemonless: No central background service. You run containers
    directly

  • Rootless by default: Run containers as a regular user-no sudo
    needed.

  • Docker-compatible: Most Docker commands work out of the box

  • Lightweight: Lower resource use, faster start-up times

  • Security: Each container process is tied to the user who started
    it, making auditing and security tighter


Docker vs. Podman: What’s the Difference?

Here’s a quick rundown:

Image description


Everyday Commands (with Examples)

Docker:

Run a container
docker run -it ubuntu bash

List running containers
docker ps

Build an image
docker build -t myapp .

Stop a container
docker stop

Podman:

Same commands work!
podman run -it ubuntu bash
podman ps
podman build -t myapp .
podman stop

Switching from Docker to Podman? Just swap the command name!

  • Use Docker if:

    • You rely on Docker Compose or Docker Swarm
    • You want the broadest compatibility and community support
    • You’re working in environments where Docker is already the standard.
  • Use Podman if:

    • Security is a top concern (rootless, no daemon).
    • You want lightweight, fast containers
    • You need tight systemd integration or want to generate unit files easily
    • You’re running containers on a multi-user system


When to Use Each Tool

  • Use Docker if:

    • You rely on Docker Compose or Docker Swarm
    • You want the broadest compatibility and community support
    • You’re working in environments where Docker is already the standard


Wrapping Up

  • Containers are the backbone of modern Linux workflows, and both
    Docker and Podman make life easier.

  • Docker is still the king for many, but Podman is catching
    up fast-especially if you care about security or running containers
    as a regular user.

The best part? You don’t have to choose just one.

Try both, see what fits your workflow, and enjoy the freedom containers bring to Linux.

Happy containerizing!

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