julia:tldr:6df23

This command is used to launch Julia with parallel processing enabled. Here's the breakdown:

• julia is the command to start the Julia programming language interpreter.
• -p option is used to specify the number of worker processes to be used for parallel computing.
• ${N} is a placeholder representing the value or variable (which needs to be substituted) for the number of worker processes. Generally, this value is provided as an environment variable or as an argument when executing the command.

For example, if you want to run Julia with 4 worker processes, you would replace ${N} with 4. The command would then become julia -p 4. This will start Julia with parallel processing enabled using 4 worker processes to distribute the workload across multiple cores or machines for faster execution.