Lynis is an open source security auditing tool which is widely used on various Unix-like operating systems. With Lynis, system administrators and security professionals can perform in-depth system-wide security scans in a matter of minutes. In this article, I will explain how to install and use Lynis on a CentOS 7 server. - A CentOS 7 x64 server instance. - A [sudo user](https://docs.vultr.com/how-to-use-sudo-on-a-vultr-cloud-server). Log in from an SSH terminal as a sudo user, and then update t......