Linux security tends to be so much better than that of competing alternatives. The open source operating system is targeted by malware writers far less frequently than Windows is. For business users, a little extra security assurance is always a good idea. Here, here are a few of the best free tools you can use to help keep your Linux systems secure. Nmap is a free and open source utility for network exploration or security auditing, but it can also be useful for network inventory, managing service upgrade schedules.”]
Source: https://www.csoonline.com/article/2128008/seven-free-security-tools-for-linux.html