$ sudo apt-get install docker.io
$ docker --version
$ sudo docker version
$ docker ps -a
$ docker ps
$ docker ps -l
$ sudo docker pull Ubuntu: 20.04
$ sudo docker pull <image_name>:<version>
$ sudo docker run -it --name <image_name> /bin/bash
$ docker container exec -it <container_id> bash
$ sudo docker start -a -i <container_name>
$ docker container ls
$ docker stop <container_id>
$ docker inspect <container_id>
$ docker run -d <container_name>
$ docker rm <container_name>
$ docker logs <container_id>
$ docker logs --since 5s <container_id>
$ docker commit -m "added the changes in xyz.txt" <container_id> <custom_img_name>
$ sudo docker images
$ sudo apt-get remove docker docker-engine docker.io containerd runc