1arduino-cli core download [PACKAGER:ARCH[@VERSION]]... [flags]

1arduino-cli core download arduino:samd       # download the latest version of Arduino SAMD core.
2  arduino-cli core download arduino:samd@1.6.9 # download a specific version (in this case 1.6.9).

1-h, --help   help for download

1--additional-urls strings   Comma-separated list of additional URLs for the Boards Manager.
2      --config-dir string         Sets the default data directory (Arduino CLI will look for configuration file in this directory).
3      --config-file string        The custom config file (if not specified the default will be used).
4      --json                      Print the output in JSON format.
5      --log                       Print the logs on the standard output.
6      --log-file string           Path to the file where logs will be written.
7      --log-format string         The output format for the logs, can be: text, json (default "text")
8      --log-level string          Messages with this level and above will be logged. Valid levels are: trace, debug, info, warn, error, fatal, panic (default "info")
9      --no-color                  Disable colored output.