run vs exec

Feature	docker run	docker exec
Purpose	Creates and starts a new container	Runs a command in an already running container
Container state	Always creates a new container	Uses an existing running container
Image required	Yes (from an image)	No (container already exists)
Typical use	Start an app or shell	Debug, inspect, or manage a container
Interactive mode	Commonly used with -it	Often used with -it
Example	docker run -it ubuntu bash	docker exec -it my_ubuntu bash