how to install bash in docker container code example

Example 1: docker access container

docker exec -it <mycontainer> bash
docker exec -it <mycontainer> sh ##for alpine

Example 2: how to bash into docker container

docker exec -it nginx /bin/bash

Example 3: docker run command on container

sudo docker exec -it <container name> <command>

Example 4: docker how to run existing container

docker start <container-name/ID>