# Workshop: Hello SAD Class

WARNING

Please prepare one folder for this Workshop

# Step 1: Create Dockerfile

Dockerfile

FROM ubuntu:20.04
CMD echo "Hello SAD Class"

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FROM: fill your base Image >> {Image Name}:{Version}
CMD: What should the container do when it is created.

# Step 2: From Dockerfile to create Docker Image

docker build . -t my-image:v1

dot means where is your Dockerfile ( . == current directory )
-t = tag, it looks like a name. You should fill version too.(default is latest)
- Tag command and syntax of tag (opens new window)

# Step 3: Run Docker Container from your Image

check your Image Image command (opens new window)

docker image ls

output

REPOSITORY                 TAG             IMAGE ID       CREATED        SIZE
my-image                   v1              7f86f670d418   7 weeks ago    72.8MB

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docker run my-image:v1

output

Hello SAD Class