I know, i use it all the time, i just think it’s silly to recommend the terminal to beginners when theres a gui way that’s easier.

To make it executable you can just right click -> properties -> make executable.

No need to use the terminal

in case you aren’t joking, rm -rf / (albiet with a warning now) will delete allll the files on your system, so everything going black is the expected result.

rm is remove, the - is to indicate that you want to pass arguments, and r&f are recursive (delete stuff in the folders in this folder) and force (don’t ask for confirmation). The slash afterwards designates the root folder, the folder with everything in it.

So “rm -rf /” means “remove, recursively and forcefully, everything in the / directory”