Linux is one of the operating systems to support the increasingly rapid development of internet technology. Apart from the speed of the process, security also needs to be considered. Center for Internet Security (CIS) Benchmark is an example of a security standard. This study implements the CIS Benchmark using the Chef Inspec application. This research focuses on building a tool to perform security audits on the Ubuntu 20.04 operating system. 232 controls on CIS Benchmark were successfully implemented using Chef Inspec application. The results of this study were 87 controls succeeded, 118 controls failed, and 27 controls were skipped. This research is expected to be a reference for information system managers in managing system security.