a book
The Design and Implementation of the 4.3 Bsd Unix Operating System
Samuel J. Leffler · 1991 · 471 pages
The first authoritative description of Berkeley UNIX, its design and implementation. Book covers the internal structure of the 4.3 BSD systems and the concepts, data structures and algorithms used in implementing the system facilities. Chapter on TCP/IP. Annotation copyright Book News, Inc. Portlan.
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Werner Vogels
“Got my hands on a nice version of the best OS book ever written. It made me become the kernel engineer that I grew up as. It was essential in getting BSD 2.9 to run on the PDP11 that I inherited (Although the Multics papers had their influence as well).”↗