It can be interesting to see how uids between the docker host and docker containers are mapped. For example, for security concerns. As a reminder, docker containers are based on two linux kernel features: linux namespaces and cgroups. Basically, linux namespaces provide isolation for running processes and cgroups allows you to isolate resource usage. Let’s first run a docker container. Here, we will run a mariadb docker in background with -d option [docker@docker1 ~]$ docker...

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