Docker create image manually

We went over this step-by-step earlier, but let’s have all the step in one place:

• Run container interactively (based on Ubuntu 25.10, call it ubu)

docker run -it --name ubu ubuntu:25.10

• Install packages, copy or create files, etc…, exit.

# apt-get update
# apt-get install htop
# echo "Hello World" > welcome.txt
# exit

• Create the image called myubu from the container called ubu

$ docker container commit ubu myubu:1.00

• Run a container based on the new image called myubu:

$ docker container run --rm -it myubu:1.00