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I quite like the FreeBSD src tree, as it comprises both the system kernel as well as the userland applications. The folders are organized similarly to the OS fi

I quite like the FreeBSD src tree, as it comprises both the system kernel as well as the userland applications. The folders are organized similarly to the OS file system hierarchy, which I find helpful for navigating the source tree. I found it accessible to slowly learn how various parts of the OS work under the hood and compound my knowledge faster due to less context shifting, since it’s self-contained in one source tree. https://github.com/freebsd/freebsd-src https://github.com/freebsd/freebsd-src

dpkirchner 4y ago
Tangentially related, I found The Design and Implementation of the 4.4 BSD Operating System fascinating back in the day. I don't know how well it holds up now (or more importantly how relevant it is) but it was genuinely interesting, especially as I was using FreeBSD at the time. https://dl.acm.org/doi/10.5555/231070 https://dl.acm.org/doi/10.5555/231070