12. System Security
System security is about as important an IT topic as there is these days. A key responsibility of a system administrator is keeping data secure and safe. In the Internet age, this requires more diligence and preparation that ever before. Even on systems inside a firewall, it is urgent to prepare and monitor for intrusions. This chapter begins by defining system security. It then tackles the issue of prevention, focusing on troubleshooting SSH and system hardening issues.
What Is System Security?
The word “security” in general usage is synonymous with “safety,” but as a technical term, “security” means not only that something is secure but that it has been secured. Systems security is a process by which the physical host and ...
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