Since I cannot provide a PDF, here are legitimate ways to obtain the 8th edition:
Are you a Computer Science student or an IT professional looking to solidify your knowledge of how computers actually work? Understanding Operating Systems 8th Edition Pdf
It’s the 8th Edition, so it includes all the recent updates on mobile OS and virtualization. Since I cannot provide a PDF, here are
Discussions on network organization, cloud computing, and system security protocols. Modern Updates and New Features Since I cannot provide a PDF