17 Virtualization

The word virtual can be vague in computing systems. It’s used primarily to indicate an intermediary that translates a complex or fragmented underlying layer to a simplified interface that can be used by multiple consumers. Consider an example that we’ve already seen, virtual memory, which allows multiple processes to access a large bank of memory as if each had its own insulated bank of memory.

That definition is still a bit daunting, so it might be better to explain the typical purpose of virtualization: creating isolated environments so that you can get multiple systems to run without clashing.

Because virtual machines ...

Get How Linux Works, 3rd Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.