Linux

Linux is technically a Kernel, but “knowing linux” involves far more.

Some books about the internals of Linux:

• Linux Kernel Development by Robert Love
• The Linux Programming Interface by Michael Kerrisk

Observability and Performance

• Systems Performance: Enterprise and the Cloud by Brendan Gregg
  • “2nd Ed will be released Dec 9, 2020”
• BPF Performance Tools by Brendan Gregg