Part 6: Security and Maintenance

DON’T you just hate housekeeping? Even though you know it’s necessary, having to dust the furniture, sweep the carpets, and wash the windows is a real pain in the posterior. But you do it anyway because you always like living in a clean house.

You also like living in a secure house, which is why you close the windows and lock the doors whenever you leave. You may even invest in a high-tech alarm system so that you’re even better protected against intruders and thieves.

When it comes to both housekeeping and security, an operating system is like a house. You have to perform periodic housekeeping duties to keep your system “clean” and in good working condition. And you have to engage in various security-related ...

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