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In Unix-like operating systems, new processes are created by the fork() system call. The PID is returned to the parent process , enabling it to refer to the child in further function calls. The parent may, for example, wait for the child to terminate with the waitpid() function, or terminate the process with kill() .
sysv-rc-conf, a TUI utility that selects which SysV-style init scripts will be run in each runlevel. When compared to its predecessors, AT&T's UNIX System III introduced a new style of system startup configuration, [9] which survived (with modifications) into UNIX System V and is therefore called the "SysV-style init".
systemd is a software suite that provides an array of system components for Linux [7] operating systems. The main aim is to unify service configuration and behavior across Linux distributions. [8] Its primary component is a "system and service manager" — an init system used to bootstrap user space and manage user processes.
Namespaces are a required aspect of functioning containers in Linux. The term "namespace" is often used to denote a specific type of namespace (e.g., process ID) as well as for a particular space of names. [1] A Linux system begins with a single namespace of each type, used by all processes.
Utilities listed in POSIX.1-2017. This is a list of POSIX (Portable Operating System Interface) commands as specified by IEEE Std 1003.1-2024, which is part of the Single UNIX Specification (SUS). These commands can be found on Unix operating systems and most Unix-like operating systems.
Instead, the system simply redefines the "parent PID" field in the child process's data to be the process that is the "ancestor" of every other process in the system, whose PID generally has the value of 1 (one), and whose name is traditionally "init" (except in the Linux kernel 3.4 and above [more info below]).
The taskkill command on Microsoft Windows. In Microsoft's command-line interpreter Windows PowerShell, kill is a predefined command alias for the Stop-Process cmdlet. Microsoft Windows XP, Vista and 7 include the command taskkill [5] to terminate processes. The usual syntax for this command is taskkill /im "IMAGENAME".
KolibriOS includes an implementation of the ps command. [1] The ps command has also been ported to the IBM i operating system. [2] In Windows PowerShell, ps is a predefined command alias for the Get-Process cmdlet, which essentially serves the same purpose.