The Debian-based Subgraph OS, first released in 2015, is a featherweight open-source solution that comes with all the security and privacy options pre-configured.
The Methodist Hospital in Henderson, Kentucky, had to declare an internal state of emergency on Tuesday after the ransomeware 'Locky' got onto its network through an attachement to a spam email. From that first infection, the ransomeware spread across the network, encrypting files and emails.