BASIC COMMANDS OF DOCKER | ATTACH vs EXEC | #3 смотреть онлайн

In this session we are going to cover :
docker hub
understand more commands in detail like:
1. docker ps
2. docker ps -a
3. docker pull
4. docker images
5. docker exec
6. docker attach

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Go watch Every Part :
Part 00 - Evolution Of docker ( Container )
https://www.youtube.com/watch?v=8CKU6vDD3F8

Part 01 - What is Docker? Why Docker? Vm vs Containers
https://www.youtube.com/watch?v=R9ltpdi5TvM

Part 02 - Basic Commands of Docker | Docker Architecture
https://www.youtube.com/watch?v=j3uUcy4tXE8

Part 03 - More Basic Commands of Docker | Attach Vs Exec
https://www.youtube.com/watch?v=kfB_n3lu6_g

Full playlist

https://www.youtube.com/playlist?list=PLt6PRev2LP5ohdRwFlu8nDFg-b5WJiB2R

" More parts coming soon "

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Difference between attach and exec:

-- Post 1.3 docker versions, if we use docker attach, we can use only one instance of shell.
-- If we want to open new terminal with new instance of container's shell, we just need to run docker exec

-- If the docker container was started using /bin/bash command, you can access it using attach, if not then you need to execute the command to create a bash instance inside the container using exec.

-- Attach isn't for running an extra thing in a container, it's for attaching to the running process.
-- "docker exec" is specifically for running new things in a already started container, be it a shell or some other process.


Difference between pull and run:
-- run will try to find the image in your local repository first, if not found will try to fetch the image from DOCKER-HUB registry or any other registry given in the command, then creates a running instance of image which is your container and then finally executes the command given to be executed inside the container.
-- pull command will just pull the image and keep it stored in the local repository but won't enter the container