How to update the image of docker

The steps to update a Docker image are as follows: Pull the latest image tag to the new image to delete the old image for a specific tag (optional) Restart the container (if needed)

How to update Docker image

Updating Docker images is an important task that ensures and benefits from the latest image versions, such as bug fixes, feature enhancements, and security updates.

step:

1. Pull the latest image

Run the following command to pull the latest version of the image:

 <code>docker pull :</code>

For example, to pull the latest version of Ubuntu image, you can run:

 <code>docker pull ubuntu:latest</code>

2. Tag the new image as a specific tag

To keep track of updated images, it is recommended to tag a specific tag for the new image. You can run the following command:

 <code>docker tag  :</code>

For example, to mark a newly pulled Ubuntu image as "latest-updated", you can run:

 <code>docker tag $(docker image inspect ubuntu:latest -f '{{.Id}}') ubuntu:latest-updated</code>

3. Delete the old image (optional)

In some cases, you may want to delete the old image to free up space. You can run the following command:

 <code>docker image prune -f</code>

This command will delete all unused images and their associated data.

4. Restart the container (if needed)

If the updated images are incompatible with existing containers, you may need to restart them. You can run the following command:

 <code>docker restart </code>

It should be noted that in some cases, restarting the container can lead to data loss.

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