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DevOps Practical

DevOps Practical

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Which of the following is NOT how to create an efficient image via a Dockerfile?

Avoid installing unnecessary packages

❌

Start with an appropriate base image

❌

Combine multiple applications into a single container

✅

Use multi-stage builds

❌

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Information on how to build a Docker image is written in a file named:

docker-compose

Dockerimage

Jenkinsfile

Dockerfile

In docker build . command, what does . stand for?

It represent the location of Dockefile, and . means current directory

It represent the arguments for building docker image, first . is represent first arguments, second dot represent second argument and so on

It’s nothing but the full stop

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Match the Dockerfile instruction and it description

instruction allows us to configure a container that will run as an executable and can modify the way a container is started from an image

instruction initializes a new build stage and sets the Base Image for subsequent instructions

instruction triggers while we launch the created Docker image and provide defaults for an executing container

instruction triggers while we build the Docker image

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What command can be used to reset all rules entered by the user?

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Enter the command that will display all added rules in a numbered list.

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Enter the command that blocks all incoming and outgoing traffic when the firewall is enabled.

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How to check the status of UFW with extended information?

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What command can be used to allow access to port 3001 from IP address 172.10.0.2?

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How to enable UFW?

ufw run

ufw new

ufw start

ufw enable

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