Totally arbitrary. If you're simply copy and pasting commands you probably don't know what you're doing, OR you're just looking for the quick shortcut. Either

Totally arbitrary. If you're simply copy and pasting commands you probably don't know what you're doing, OR you're just looking for the quick shortcut. Either way, when I paste I usually put it through a scrapped terminal. Meaning I have to hit enter twice for any command to actually be executed. If you're not checking your commands before you hit enter it's like getting in a car for the first time and bringing it to top speed hoping that it won't rattle apart and kill you. To further this analogy, if I were to get a car from a dealership brand new it might have some issues but for the most part it's brand new and safe. If I'm buying a car from some shady lot behind a Waffle House, well then I should probably bring it to a mechanic to get inspected and such. To detract from the analogy, dealerships are giving out different new cars while copy/pasting code from tutorials such as Linode are always giving the user the same content, they've been checked numerous times and hopefully the bullshit has been caught already.