Linux Hint published a tutorial about how to detect Rootkits.

What are Rootkits and how to detect them

Rootkits are considered as the worst attack than any other virus. They are difficult to find and can damage your system severely. We need to study different types of Rootkits so that we can find them and wipe out. To wipe them completely, change the system’s passwords, patch all the weak links, and reformat the drive as we never know what is still inside the system.

What are Rootkits and how to detect them – Linux Hint