- System console
The system console, root 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. It is a physical device consisting of a keyboard and a screen.
On traditional minicomputers, the console was a serial console, an RS-232 serial link to a terminal such as a DEC VT100. This terminal was usually kept in a secured room since it could be used for certain privileged functions such as halting the system or selecting which media to boot from. Large midrange systems, e.g. those from Sun Microsystems, Hewlett-Packard and IBM, still use serial consoles. In larger installations, the console ports are attached to multiplexers or network-connected multiport serial servers that let an operator connect a terminal to any of the attached servers. Today, serial consoles are often used for accessing headless systems, usually with a terminal emulator running on a laptop. Also, routers, enterprise network switches and other telecommunication equipment have RS-232 serial console ports.
On PCs and workstations, the computer's attached keyboard and monitor have the equivalent function. Since the monitor cable carries video signals, it cannot be extended very far. Often, installations with many servers therefore use keyboard/video multiplexers (KVM switches) and possibly video amplifiers to centralize console access. In recent years, KVM/IP devices have become available that allow a remote computer to view the video output and send keyboard input via any TCP/IP network and therefore the Internet.
Some PC BIOSes, especially in servers, also support serial consoles, giving access to the BIOS through a serial port so that the simpler and cheaper serial console infrastructure can be used. Even where BIOS support is lacking, some operating systems, e.g. FreeBSD and Linux, can be configured for serial console operation either during bootup, or after startup.
It is usually possible to log in from the console. Depending on configuration, the operating system may treat a login session from the console as being more trustworthy than a login session from other sources.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Console Classix — Inc. Type Private Industry Rental Founded 2000 Headquarters South Carolina … Wikipedia
Console server — A 32 port serial console server A console server (console access server, console management server, serial concentrator, or serial console server) is a device or service that provides access to the system console of a computing device via… … Wikipedia
Console — Contents 1 Computing and video games 2 Music 3 Other 4 Se … Wikipedia
Console Server — Ein Konsolenserver (Englisch: Console Server) ist eine Fernwartungskomponente und dient zum Management von Rechnernetzknoten, die eher im Rechenzentrum anzutreffen sind, wie (Unix )Server, Router, Switches, Firewalls, Telefonanlagen, USVs. Die… … Deutsch Wikipedia
Console wars — also known as System wars is a term used to refer to periods of intense competition for market share between video game console manufacturers. The winners of these wars may be debated based on different standards: market penetration and financia … Wikipedia
Console exclusivity — refers to the status of a video game being released on only one video game console. Console exclusivity is a topic which is utilized in discussions of the advantages and disadvantages of rival firms in the video game market, and one which is used … Wikipedia
Console (Mac OS X) — Console Developer(s) Apple Inc … Wikipedia
System request — (often abbreviated SysRq or Sys Req) is a key on keyboards for PCs that has no standard usecite web|title=What is the SysRq key for?|work=comp.os.msdos.programmer FAQ|url=http://www.faqs.org/faqs/msdos programmer faq/part2/|accessdate=2008 01 08] … Wikipedia
Console — Con sole, n. [F.] 1. (Arch.) (a) A bracket whose projection is not more than half its height. (b) Any small bracket; also, a console table. [1913 Webster] 2. (Computers) The keyboard and monitor of a computer considered together. [GG] 3.… … The Collaborative International Dictionary of English
console model — Console Con sole, n. [F.] 1. (Arch.) (a) A bracket whose projection is not more than half its height. (b) Any small bracket; also, a console table. [1913 Webster] 2. (Computers) The keyboard and monitor of a computer considered together. [GG] 3.… … The Collaborative International Dictionary of English