Docker

Question 1

Ducker Run

Answer 1

Tells Docker daemon to deploy the specified image to a docker Host and Start to run(as a container)D

Question 2

Docker Build

Answer 2

Converts a dockerfile or file/program into an image using the specifications of the dockerfile

Question 3

Docker Pull

Answer 3

asks the daemon to ‘Look for’ and download the specified image either from docker Hub or a specified Location

Question 4

Docker Push

Answer 4

Upload a file up to a Repository as specified

Question 5

Writable layers

Answer 5

Writable layers are linked to the lifecycle of the container.
They don’t persist.

Question 6

docker run command

Answer 6

~$ docker run 8080:80 containerName

where Tcp80 is the port on the container and 8080, the host port

Question 7

run docker on detached mode

Answer 7

~$ docker run -p 8080:80 -d containerImageName

where Tcp80 is the port on the container and 8080, the host port

Question 8

Execute commands inside container

Answer 8

$ docker exec -it RunningContainer_id commands

-it is a combination of both the -i and -t command options

Question 9

docker processes commands

Answer 9

docker ps

all === -aux

Question 10

$ docker ps -a

Answer 10

shows all container processes

Question 11

the -t option

Answer 11

-t option, which allocates a pseudo-TTY to the container. The -t option is typically used when you want to interact with the container’s shell or terminal. However, it’s not typically used with -d (detached) because detached containers don’t have an interactive terminal.