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Docker doesn't recommend running an apt-get upgrade and dist-upgrade on a docker image as many of the "essential" packages from the partent image cannot upgrade inside an unprevileged container. take a look at the Docker best practices


That is not good design to have docker or any lib update after logging into the container. As mentioned by Andrea Giaime Bodei , you need to update the base image in the Dockerfile and rebuild the image. The docker images are immutable. # Download base image ubuntu 20.04 FROM ubuntu:20.04 # LABEL about the custom image LABEL maintainer="

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