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The command starts a Docker container with e3sm:2021.03.18 image, mounts your .ssh/ directory to a corresponding directory of the ‘e3sm’ user in the container, mounts your e3sm project data directory projects/e3sm to a corresponding directory in the container, and run a command to switch to the ‘e3sm’ user in the container. By default, Docker sets a memory usage limit for containers on macOS and Windows systems to 2 GB. The limit may trigger the OOM Killer that will kill a running case with 9 signal. If needed, a memory limit can be increased with the -m option when launching starting a docker container, e.g. -m 16g.
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