What is PID 0? · blog.dave.tf
blog.dave.tf
Yes, there's a PID 0! An explanation of what it is, and a quick walk through linux early boot code.
  • boatswain@infosec.pub
    21·
    6 months ago

    The tl;dr from the article (which is actually worth a read):

    The very short version: Unix PIDs do start at 0! PID 0 just isn’t shown to userspace through traditional APIs. PID 0 starts the kernel, then retires to a quiet life of helping a bit with process scheduling and power management. Also the entire web is mostly wrong about PID 0, because of one sentence on Wikipedia from 16 years ago.