Shell one-liner for the thing you keep googling

You keep googling the same shell command and copying it without understanding it. This gives you a one-liner for your OS, breaks down what every part does, and offers a safer multi-line version with comments. For the moment you need it done now but would rather not paste something you don't trust into a terminal.

I want to [task] from the command line on {OS}. Give me a one-liner, explain each piece, and offer a safer multi-line version with comments.