How to Clean Julia Directory, Registries, etc After Long Usage?

General Usage
2

For “cleaning up” things there’s the ]gc command in the Pkg REPL:

(jl_auRg37) pkg> ?gc
  gc [-v|--verbose] [--all]

  Free disk space by garbage collecting packages not used for a significant time. 
  The --all option will garbage collect all packages which can not be immediately 
  reached from any existing project. Use verbose mode for detailed output.

For a more thorough clean maybe look at:

I would encourage you to open a separate thread for plotting issues, which are unrelated to cleaning up Julia related directories - this is helpful for others who find these threads through searches later on.

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