What is eBPF? How does it work? How can I use it?

Some light bedtime reading.

• What is eBPF, from a technical perspective?

ebpf.io has had some serious work put into it:

• ▶ eBPF: Unlocking the Kernel [Official Documentary]
• Learn
  • What is eBPF?
  • Get Started
  • Case Studies
  • Interactive Labs
  • Children's Guide to eBPF
• Project Landscape
  • Major Infrastructure
  • List of Major Applications
• ...
• Blog
• ...