How to check your Linux servers for rootkits and malware

If your data center makes use of Linux, you want to ensure those servers are free from both rootkits and malware. Although Linux, in general, is safe from a vast amount of malicious software, it is a mistake to assume it completely impervious. Not only could you wind up with a data-destroying rootkit, if one of your Linux machines happens to work as a web server, that machine could have been compromised and is now serving up malicious code.