If some company made a plastic dick that squirts water, kids would be enthralled. They wouldn't even think it was anything sexual; as far as they're concerned they'd all just be shooting pee at each other.
You are correct, left hand is a fork bomb. Specifically, it creates and then runs a function named ":". What this function does is pipe its output into itself while running in a background process, which instantly spawns infinite copies of itself. Technically I believe the : character could be any character as its just a name. The creator just picked a colon for aesthetics.
Yeah, general practice is to either elevate privelige by switching accounts, or by using sudo. Having both just increases your attack surface to no practical benefit (especially since you can technically still switch to a root account with "sudo - i" even if you're going the sudo route).
You did. If you leave your root password blank it'll automatically add the user account you create in the following step to sudo and disable the root account.
If you want to have both a root account and a user account with sudo, you'll have to do that manually, but that's a pretty unusual setup.
I say this as someone who's a fan of big, complicated, hours long games; 90% of the time, the numbers listed on the box are a total fucking lie.
OK, to be more precise, they typically measure how long the designers - who know every rule, never deliberate over what action to take, always pass priority when they're done, and never stop to grab a glass of water - think the game should take. And probably don't include set up time.