1. Docker Basic Workflow (Ubuntu Example)

1. Pull Ubuntu Image from Docker Hub

2. Verify Downloaded Docker Images

3. Run Ubuntu Container in Interactive Mode

4. List All Containers (Running + Stopped)

5. Create a Named Ubuntu Container

6. Access a Running Container Using Name

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2. Create a Custom Docker Image

Step 1: Create a Dockerfile

FROM ubuntu:24.04
RUN echo "Hello Alamgir" > /hello.txt
CMD ["cat", "/hello.txt"]

Step 2: Build the Image

docker build .
docker build -t custom_ubuntu . # assigns a name (tag) to the image

Step 3: Run the Custom Image

docker run custom_ubuntu