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Magic SysRq key

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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. [1]

45 relations: Alt key, AZERTY, Booting, Chromebook, Colemak, Computer display standard, Dvorak Simplified Keyboard, Escape sequence, Fedora Project, File system, File system permissions, Fn key, Fsck, GitHub, IBM, IBM DeveloperWorks, Kernel panic, Kernel.org, KVM switch, Linux kernel, Load (computing), Lock (computer science), Mnemonic, Nice (Unix), Open Firmware, Out of memory, Print screen, Process identifier, Procfs, QWERTY, Real-time computing, Red Hat, Reset (computing), Reset button, Secure attention key, Signal (IPC), Sun Microsystems, SVGALib, Sysctl, System console, System request, Terminal server, Text mode, X Window System, Xen.

Alt key

The Alt key (pronounced or) on a computer keyboard is used to change (alternate) the function of other pressed keys.

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AZERTY

AZERTY is a specific layout for the characters of the Latin alphabet on typewriter keys and computer keyboards.

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Booting

In computing, booting is starting up a computer or computer appliance until it can be used.

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Chromebook

A Chromebook is a laptop or tablet running the Linux-based Chrome OS as its operating system.

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Colemak

Colemak is a keyboard layout for Latin-script alphabets, created by and named after Shai Coleman in 2006.

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Computer display standard

Computer display standards are a combination of aspect ratio, display size, display resolution, color depth, and refresh rate.

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Dvorak Simplified Keyboard

The Dvorak Simplified Keyboard is a keyboard layout patented during 1936 by Dr.

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Escape sequence

An escape sequence is a series of characters used to change the state of computers and their attached peripheral devices, rather than to be displayed or printed as regular data bytes would be.

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Fedora Project

The Fedora Project is a project sponsored by Red Hat primarily to co-ordinate the development of the Linux-based Fedora operating system, operating with the vision that the project "creates a world where free culture is welcoming and widespread, collaboration is commonplace, and people control their content and devices." The project also oversees Extra Packages for Enterprise Linux, a special interest group which maintains the eponymous packages.

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File system

In computing, a file system or filesystem controls how data is stored and retrieved.

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File system permissions

Most file systems have methods to assign permissions or access rights to specific users and groups of users.

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Fn key

The Fn key, short form for function, is a modifier key on many keyboards, especially on laptops, used in a compact layout to combine keys which are usually kept separate.

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Fsck

The system utility fsck (file system consistency check) is a tool for checking the consistency of a file system in Unix and Unix-like operating systems, such as Linux, macOS, and FreeBSD.

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GitHub

GitHub Inc. is a web-based hosting service for version control using Git.

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IBM

The International Business Machines Corporation (IBM) is an American multinational technology company headquartered in Armonk, New York, United States, with operations in over 170 countries.

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IBM DeveloperWorks

developerWorks is a free web-based professional network and technical resource center from IBM for software developers, IT professionals, and students worldwide.

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Kernel panic

A kernel panic (sometimes abbreviated as KP) is a safety measure taken by an operating system's kernel upon detecting an internal fatal error in which it either is unable to safely recover from or cannot have the system continue to run without having a much higher risk of major data loss.

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Kernel.org

kernel.org is the main distribution point of source code for the Linux kernel, which is the base of the Linux operating system.

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KVM switch

A KVM switch (with KVM being an abbreviation for "keyboard, video and mouse") is a hardware device that allows a user to control multiple computers from one or more sets of keyboards, video monitors, and mice.

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Linux kernel

The Linux kernel is an open-source monolithic Unix-like computer operating system kernel.

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Load (computing)

In UNIX computing, the system load is a measure of the amount of computational work that a computer system performs.

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Lock (computer science)

In computer science, a lock or mutex (from mutual exclusion) is a synchronization mechanism for enforcing limits on access to a resource in an environment where there are many threads of execution.

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Mnemonic

A mnemonic (the first "m" is silent) device, or memory device, is any learning technique that aids information retention or retrieval (remembering) in the human memory.

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Nice (Unix)

nice is a program found on Unix and Unix-like operating systems such as Linux.

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Open Firmware

Open Firmware, or OpenBoot in Sun Microsystems parlance, is a standard defining the interfaces of a computer firmware system, formerly endorsed by the Institute of Electrical and Electronics Engineers (IEEE).

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Out of memory

Out of memory (OOM) is an often undesired state of computer operation where no additional memory can be allocated for use by programs or the operating system.

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Print screen

Print screen (often abbreviated Print Scrn, Prnt Scrn, Prt Scrn, Prt Scn, Prt Scr, Prt Sc or Pr Sc) is a key present on most PC keyboards.

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Process identifier

In computing, the process identifier testing (normally referred to as the process ID or PID) is a number used by most operating system kernels—such as those of UNIX, macOS and Microsoft Windows—to uniquely identify an active process.

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Procfs

The proc filesystem (procfs) is a special filesystem in Unix-like operating systems that presents information about processes and other system information in a hierarchical file-like structure, providing a more convenient and standardized method for dynamically accessing process data held in the kernel than traditional tracing methods or direct access to kernel memory.

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QWERTY

QWERTY is a keyboard design for Latin-script alphabets.

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Real-time computing

In computer science, real-time computing (RTC), or reactive computing describes hardware and software systems subject to a "real-time constraint", for example from event to system response.

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Red Hat

Red Hat, Inc. is an American multinational software company providing open-source software products to the enterprise community.

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Reset (computing)

In a computer or data transmission system, a reset clears any pending errors or events and brings a system to normal condition or an initial state, usually in a controlled manner.

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Reset button

In electronics and technology, a reset button is a button that can reset a device.

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Secure attention key

A secure attention key (SAK) or secure attention sequence (SAS) is a special key or key combination to be pressed on a computer keyboard before a login screen which must, to the user, be completely trustworthy.

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Signal (IPC)

Signals are a limited form of inter-process communication (IPC), typically used in Unix, Unix-like, and other POSIX-compliant operating systems.

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Sun Microsystems

Sun Microsystems, Inc. was an American company that sold computers, computer components, software, and information technology services and created the Java programming language, the Solaris operating system, ZFS, the Network File System (NFS), and SPARC.

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SVGALib

SVGAlib was an open-source low-level graphics library which runs on Linux and FreeBSD and allows programs to change video mode and display full-screen graphics.

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Sysctl

sysctl is a software utility of some Unix-like operating systems that reads and modifies the attributes of the system kernel such as its version number, maximum limits, and security settings.

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System console

The system console, computer console, root console, operator's console, or simply console is the text entry and display device for system administration messages, particularly those from the BIOS or boot loader, the kernel, from the init system and from the system logger.

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System request

System request (often abbreviated SysRq or Sys Req) is a key on personal computer keyboards that has no standard use.

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Terminal server

A terminal server enables organizations to connect devices with an RS-232, RS-422 or RS-485 serial interface to a local area network (LAN).

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Text mode

Text mode is a computer display mode in which content is internally represented on a computer screen in terms of characters rather than individual pixels.

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X Window System

The X Window System (X11, or shortened to simply X) is a windowing system for bitmap displays, common on UNIX-like computer operating systems.

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Xen

Xen Project (pronounced) is a hypervisor using a microkernel design, providing services that allow multiple computer operating systems to execute on the same computer hardware concurrently.

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References

[1] https://en.wikipedia.org/wiki/Magic_SysRq_key

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