You use the Image ID to resolve the ambiguity. One will be tagged "latest" (the running version) while the other will be tagged "\" (the prior version). You will find two containers with the same name. The most common situation where you are likely to need the Image ID is after an image has been updated on DockerHub and pulled down to your Raspberry Pi. In general, you can use the repository name to remove an image but the Image ID is sometimes needed. When your Dockerfile changes, you need to rebuild like this: When Dockerfile changes ( local image only) ¶ You can also add nodes to Node-RED using Manage Palette.Node-RED also provides a good example of why your Dockerfile might change: if you decide to add or remove add-on nodes.
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