-These days, "[Virus]" is an umbrella term for any kind of malware, be it an actual virus, a worm, a trojan horse, or any other malicious piece of code. The boundaries between the types are blurring, anyway. While [Linux] and other [Unix] derivatives are by no means immune from malware, both the sloppier system design and the popularity (and often sloppy administration) of MicrosoftWindows means that [Linux] viruses are a negligible minority. Of course, if you run [Windows] programs on [Linux] in an emulation such as [Wine] or [VMWare], that isolated environment is still susceptible, even if the system around it goes unaffected.