Mastering Linux Security and Hardening - Third Edition

15

Prevent Unwanted Programs from Running

Once upon a time, we didn’t have to worry much about Linux malware. While it’s still true that Linux users don’t have to worry about viruses, there are other types of malware that can definitely ruin a Linux user’s day. Cryptomining programs planted on your server can eat up memory and CPU cycles, causing your server to work much harder and use more power than it should. Ransomware, which can encrypt either important files or a system’s bootloader, can make these important files or even the whole system inaccessible. Even paying the demanded ransom isn’t always a guarantee that your system will be returned to proper order. One way to prevent these programs from doing their damage is to only allow authorized ...