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Re:Ask HN: What is a good book on operating systems? by chirau on Wednesday May 29, 2019 @12:03PM (#20041832)
Operating Systems: Three Easy Pieces

Remzi H. Arpaci-Dusseau and Andrea C. Arpaci-Dusseau. It is free here http://ostep.org/

Re:Ask HN: What is a good book on operating systems? by avichalp on Thursday May 30, 2019 @03:22AM (#20049077)
Thanks for sharing. This is the first time I have come across this recommendation. It looks interesting.