What Are Unix Pids And How Do They Work
Whenever a process is created in a Linux system, it is given a new number that identifies it to other applications. This is the process ID, or PID, and it is used throughout the system to manage running processes. How Processes Work In Linux The first process Linux runs is called systemd, which is given PID 0. All other processes are spawn as children of systemd. The first few will usually be low-level Linux stuff that you won’t need to worry about, but further down the tree the system will start launching user-level processes like MySQL and Nginx....