title: Meaning of PID, PPID and TGID
body: <p>What does the Linux kernel acronyms PID, PPID, TGID stand for?</p>
  
  <p>I stumbled upon them at <a href="https://github.com/serejkus/strace-pids#readme" rel="noreferrer">strace-pids</a>.</p>