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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.
The magic SysRq key is a key combination understood by the Linux kernel, which allows the user to perform various low-level commands regardless of the system's state. It is often used to recover from freezes , or to reboot a computer without corrupting the filesystem . [ 1 ]
A dedicated program, the spooler, maintains an orderly sequence of jobs for the peripheral and feeds it data at its own rate. Conversely, for slow input peripherals, such as a card reader , a spooler can maintain a sequence of computational jobs waiting for data, starting each job when all of the relevant input is available; see batch processing .
As a command-line interface (CLI), Bash operates within a terminal emulator, or text window, where users input commands to execute various tasks. It also supports the execution of commands from files, known as shell scripts, facilitating automation. In keeping with Unix shell conventions, Bash incorporates a rich set of features.
Junos operating system is primarily based on FreeBSD on bare metal and later also with Linux kernel. [8] Because FreeBSD is a Unix implementation, users can access a Unix shell and execute normal Unix commands. Junos runs on most or all Juniper hardware systems. [9]
Astra Linux – a similar project by the Russian government; Unity Operating System; Canaima (operating system) – a similar project by the Venezuelan computer manufacturer VIT, C.A. and Chinese information technology company Inspur; GendBuntu – a similar project used by Gendarmerie in France; LiMux – a similar project of the city council ...
Each reader/interpreter or output writer was a separate operating system task in its own partition or region. [3] A system with a large number of readers, printers, and punches might have a large number of spooling tasks. HASP was developed by IBM Federal Systems Division contractors at the Lyndon B. Johnson Space Center in Houston. The ...
The kill command is a wrapper around the kill() system call, which sends signals to processes or process groups on the system, referenced by their numeric process IDs (PIDs) or process group IDs (PGIDs). kill is always provided as a standalone utility as defined by the POSIX standard.