Was working on my server today, trying to see if I could get something that would restart my server every now and then to reduce lag. I found something that looked perfect! It was a .sh file that you run though terminal (Mac command prompt). Anyways, I ran it with "sudo sh mac_install.sh" aaand.

It changed every single one of my permissions on my entire computer (except the admin account) to no read/write/or execute. (000?)
Tl;dr
DON'T TRUST THE INTERNET