If someone gets unwanted remote access to my computer/OS, what's to prevent them from opening a terminal and changing the permissions on my files?
I have a FW that is very good, but, let's assume someone hijacked the browser and they got remote access. I don't want them to be able to delete or modify the files. There's no password for opening a terminal. Can I put a password on the terminal? Can the hijacker open a terminal and make changes?
I do not have a password on accessing the local OS and I don't know how to put one on. The only passwords I have are for admin to desktop and FW.
Debian stretch; orangepi, fw