Anon, how secure is an untouched Linux (Mint for example), despite possible integrated security flaws? I am relatively new to Linux and overwhelmed by hardening a system although I found some good hints in this bread. But I am afraid to tear holes in my system. Where do I start learning about Linux security and Linux in general? Do I really have to read a 400p handbook about Linux file system etc? ATM I am using Linux Mint, but looking for a non-systemd distro.