Every system has its own security software’s so for securing your LINUX, the FIRST three steps are:

Auditing: A system scan is PERFORMED using a TOOL called Lynis for auditing. Every category is scanned separately and the hardening index is provided to the auditor for further steps. 

Hardening: After the audit is complete, the system is hardened depending on the level of security it further needs. It is an important process based on the decision of auditor. 

Compliance: The system needs to be checked almost every day for better results and ALSO lesser threats from security point of view. 

Every system has its own security software’s so for securing your Linux, the first three steps are:

Auditing: A system scan is performed using a tool called Lynis for auditing. Every category is scanned separately and the hardening index is provided to the auditor for further steps. 

Hardening: After the audit is complete, the system is hardened depending on the level of security it further needs. It is an important process based on the decision of auditor. 

Compliance: The system needs to be checked almost every day for better results and also lesser threats from security point of view.