Search on the web to download your Linux distributions, or use one of these scripts to automate the process... Which one is best for you?
What kind of script you want to use? Python, Bash, etc. Run the code and just enter the distribution name, version and architecture. Use -l/--list to see all available options.
Useful links:
This project is licensed under the MIT license found in the LICENSE file in the root directory of this repository.