Linux Operating system is generally thought of as Virus Proof; It is indeed a very secure Operating system but to think Linux Virus does not exist or Linux is virus-proof is being overly naive. Researchers have shown that Native ELF Linux Viruses are technically possible. So far, Linux viruses are either prependers or regular file infectors that change entry and alter the actual host code. We have compiled he list of prominent Linux virus show up to date. Let’s investigate the viruses and risk posed by them.