Information about Computer Console
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Knoppix system console showing the boot process
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 his terminal to any of the attached servers.
On PCs, 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.
Routers and Managed Switches (as well as other networking and telecoms equipment) may also have console ports in particular Cisco Systems routers and switches that use Cisco IOS are normally configured via their console ports.
See also
- Command line interface (CLI)
- Bootloader
- SysRq (System Request)
- Console server
- Win32 console
External links
- How-to make a null modem cable and use the serial console in OpenBSD 4.1 - A light pictorial. [2007]
- Setting up a serial console on Linux - Tutorial explaining how to set up a serial console on a Linux PC
- Remote Serial Console HOWTO - how to configure Linux to attach a serial console
- How to install Debian over a serial console ? by Rainer Clasen 1999
Bios or BIOS may refer to:
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- Life (in Greek, βίος/Bios)
- Biographies, a genre of literature/media based on accounts of people's lives
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In computing, booting (booting up) is a bootstrapping process that starts operating systems when the user turns on a computer system. A boot sequence is the set of operations the computer performs when it is switched on that loads an operating system.
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kernel is the central component of most computer operating systems (OS). Its responsibilities include managing the system's resources (the communication between hardware and software components).
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init (short for "initialization") is the program on Unix and Unix-like systems that spawns all other processes. It runs as a daemon and typically has PID 1.
The functionality diverged, in Unixes such as System III and System V, from the functionality provided by the init in
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The functionality diverged, in Unixes such as System III and System V, from the functionality provided by the init in
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syslog is a standard for forwarding log messages in an IP network. The term "syslog" is often used for both the actual syslog protocol, as well as the application or library sending syslog messages.
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Minicomputer (colloquially, mini) is a largely obsolete term for a class of multi-user computers that lies in the middle range of the computing spectrum, in between the largest multi-user systems (mainframe computers) and the smallest single-user systems (microcomputers or
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In telecommunications, RS-232 (Recommended Standard 232) is a standard for serial binary data signals connecting between a DTE (Data terminal equipment) and a DCE (Data Circuit-terminating Equipment). It is commonly used in computer serial ports.
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A computer terminal is an electronic or electromechanical hardware device that is used for entering data into, and displaying data from, a computer or a computing system. A computer terminal is an instance of a human-machine interface(HMI).
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Digital Equipment Corporation was a pioneering American company in the computer industry. It is often referred to within the computing industry as DEC. (This acronym was frequently officially used by Digital itself,[1] but the official name was always DIGITAL.
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VT100 was a video terminal made by Digital Equipment Corporation (DEC) which became the de facto standard used by terminal emulators.
It was introduced in August 1978, following its predecessor, the VT52, and communicated with its host system over serial lines using the
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It was introduced in August 1978, following its predecessor, the VT52, and communicated with its host system over serial lines using the
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Midrange computer or midrange system is a term used by IBM afficionados to products such as the IBM System/32, System/34, System/36, System/38, or AS/400 - iSeries.
In general, midrange refers to computers that are more powerful and capable than personal computers but less powerful
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In general, midrange refers to computers that are more powerful and capable than personal computers but less powerful
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Sun Microsystems
Public (NASDAQ: JAVA )
Founded 1982
Headquarters Santa Clara, California, United States
Key people Scott McNealy, Chairman
Jonathan I.
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Public (NASDAQ: JAVA )
Founded 1982
Headquarters Santa Clara, California, United States
Key people Scott McNealy, Chairman
Jonathan I.
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Hewlett-Packard Co.
Public (NYSE: HPQ )
Founded Palo Alto, California (1939)
Headquarters Palo Alto, California, USA
Key people Bill Hewlett, Co-founder
David Packard, Co-founder
Mark V.
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Public (NYSE: HPQ )
Founded Palo Alto, California (1939)
Headquarters Palo Alto, California, USA
Key people Bill Hewlett, Co-founder
David Packard, Co-founder
Mark V.
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International Business Machines Corporation
Public (NYSE: IBM )
Founded 1889, incorporated 1911
Headquarters Armonk, New York, USA
Key people Samuel J.
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Public (NYSE: IBM )
Founded 1889, incorporated 1911
Headquarters Armonk, New York, USA
Key people Samuel J.
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personal computer (PC) is a computer whose original sales price, size, and capabilities make it useful for individuals.
It is unknown who coined the phrase with the intent of a small affordable computing device but John W.
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It is unknown who coined the phrase with the intent of a small affordable computing device but John W.
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keyboard is a peripheral partially modeled after the typewriter keyboard. Keyboards are designed to input text and characters, as well as to operate a computer. Physically, keyboards are an arrangement of rectangular buttons, or "keys".
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A computer display monitor, usually called simply a monitor, is a piece of electrical equipment which displays viewable images generated by a computer without producing a permanent record.
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KVM switch (with KVM being an abbreviation for Keyboard, Video, Mouse) is a hardware device that allows a user to control multiple computers from a single keyboard, video monitor and mouse.
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Internet is a worldwide, publicly accessible series of interconnected computer networks that transmit data by packet switching using the standard Internet Protocol (IP). It is a "network of networks" that consists of millions of smaller domestic, academic, business, and government
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Bios or BIOS may refer to:
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- Life (in Greek, βίος/Bios)
- Biographies, a genre of literature/media based on accounts of people's lives
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An operating system (OS) is the software that manages the sharing of the resources of a computer. An operating system processes system data and user input, and responds by allocating and managing tasks and internal system resources as a service to users and programs of the
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FreeBSD is a Unix-like free operating system descended from AT&T UNIX via the Berkeley Software Distribution (BSD) branch through the 386BSD and 4.4BSD operating systems.
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Linux (pronunciation: IPA: /ˈlɪnʊks/, lin-uks) is a Unix-like computer operating system. Linux is one of the most prominent examples of free software and open source development; its underlying source code can be
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logging (or signing) in and out is the process by which individual access to a computer system is controlled by identification of the user in order to obtain credentials to permit access. It is an integral part of computer security.
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Cisco Systems,Inc.
Public (NASDAQ: CSCO , HKSE: 4333 )
Founded 1984
Headquarters San Jose, California, USA
Key people CEO and President: John Chambers
Chairman: John Chambers
Industry Networking hardware
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Public (NASDAQ: CSCO , HKSE: 4333 )
Founded 1984
Headquarters San Jose, California, USA
Key people CEO and President: John Chambers
Chairman: John Chambers
Industry Networking hardware
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Cisco IOS (originally Internetwork Operating System) is the software used on the vast majority of Cisco Systems routers and all current Cisco network switches. IOS is a package of routing, switching, internetworking and telecommunications functions tightly integrated with a
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command line interface or CLI is a method of interacting with an operating system or software using a command line interpreter. This command line interpreter may be a text terminal, terminal emulator, or remote shell client such as PuTTY.
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In computing, booting (booting up) is a bootstrapping process that starts operating systems when the user turns on a computer system. A boot sequence is the set of operations the computer performs when it is switched on that loads an operating system.
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SysRq, SysReq or Sys Req (short for System Request) is a key on keyboards for PCs that has no standard use. This key can be traced back to the operator interrupt key used on IBM 3270-type console keyboards of the IBM System/370 mainframe computer, which was
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A console server (also console access server or console management server or serial console server) is a device or service that provides access to the system console of a computing device via networking technologies.
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