Managing processes is very important because processes are what consumes system resources. System users should be careful about the processes they are creating, in order to ensure that a process is not affecting any other critical processes.
In bash, creating a process is very easy. When a program is executed, a new process is created. In a Linux or Unix-based system, when a new process is created, a unique ID is assigned to it, which is known as PID. A PID value is always a positive number starting from 1. Depending upon a system having init or systemd, they always get the PID value 1 because this will be the first process in a system and it is the ancestor of all other processes.
The maximum value of PID is defined in the pid_max file, which should be available in the /proc/sys/kernel/ directory. By default, the pid_max file contains the value 32768 (max PID + 1), which means a maximum of 32767 processes can exist in a system simultaneously...