How is Ubuntu not affected by viruses?

If Ubuntu is free, what’s in Ubuntu Advantage?

What’s the largest desktop migration to Ubuntu so far?

How do we do compliance for Ubuntu?

What’s Canonical’s role in OpenStack? 

Why is Ubuntu the most popular operating system for cloud? 

How do I train as an Ubuntu system administrator?

Can Ubuntu be integrated with Microsoft infrastructure?

What does Ubuntu mean?

What is a folder in Ubuntu?

What is the meaning of 'export' command in Ubuntu?

Explain why Ubuntu is safe and not affected by viruses?

Explain what is Unity in Ubuntu? How can you add new entries to the launcher?

What is the use of behavior tab in Ubuntu?

Explain the purpose of using a libaio package in Ubuntu?