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What is the difference between VM (Virtual Machine) and Containers?
Containers provide a way to virtualise an OS so that multiple workloads can run on a single OS instance.
Container does not need a full blown OS for running applications
Usually size of a container is very small if compared with VM
With VMs, the hardware is being virtualised to run multiple OS instances.
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1 A container is a process with it’s own isolated environment
2 What is the difference between VM and Containers?
3 Docker is platform consisting of tools to create, run and manage containers
4 Select the advantages of Container.
5 Elastic IP is a static IP address which changes when you reboot or restart the instance.
6 Container allows the OS to run isolated from other processes hosted by the same OS. Linux kernel namespaces is used for isolating -
7 Port 22 of instance must be open if you want to connect with the instance via SSH.
8 chmod 400 <file_name>
9 We can run multiple containers with same docker image
10 What command is used to start docker daemon?
11 Container image is a file which is used to start or create containers.
12 What command is used to see the list of running containers?
13 Docker file is a text file with a set of instructions to create a docker image.
14 What command is used to check history of all running containers?
15 What is the command to check if docker is running fine?
16 What is the command if we want to start docker just with start of instance?
17 Each instruction in a dockerfile creates a layer in the docker image. When rebuilding the image, all the layers are recreated from the scratch.
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