R - Definitions

  • R

    raceway

    A raceway is an enclosed conduit that forms a physical pathway for electrical wiring... (Continued)

  • RAIN (redundant/reliable array of inexpensive/independent nodes)

    RAIN (also called channel bonding, redundant array of independent nodes, reliable array of independent nodes, or random array of independent nodes) is a cluster of nodes connected in a network topology with multiple interfaces and redundant storage, providing fault tolerance and graceful degradation.

  • raised floor

    A raised floor is a data center construction model in which a slightly higher floor is constructed above the building's original concrete slab floor, leaving the open space created between the two for wiring or cooling infrastructure.

  • real-time operating system (RTOS)

    A real-time operating system (RTOS) is an operating system that guarantees a certain capability within a specified time constraint. For example, an operating system might be designed to ensure that a certain object was available for a robot on an assembly line. In what is usually called a "hard" real-time operating system, if the calculation could not be performed for making the object available at the designated time, the operating system would terminate with a failure. In a "soft" real-time operating system, the assembly line would continue to function but the production output might be lower as objects failed to appear at their designated time, causing the robot to be temporarily unproductive.

  • Red Hat

    Red Hat is a leading software company in the business of assembling open source components for the Linux operating system and related programs into a distribution package that can easily be ordered and implemented.

  • Red Hat Enterprise Linux (RHEL)

    Red Hat Enterprise Linux (RHEL) is a distribution of the Linux operating system developed for the business market... (Continued)

  • Red Hat Satellite

    Red Hat Satellite is an IT infrastructure management tool primarily used to monitor and manage Red Hat Enterprise Linux environments.

  • remote hands

    Remote hands is a service offered by colocation providers that allows customers to delegate management tasks to a technician hired by the provider.

  • Remote Job Entry (RJE)

    Remote Job Entry (RJE) is a facility that allows remote computer users to submit a job (the running of a specific program or group of programs) to a centrally-located IBM mainframe computer.

  • Resource Access Control Facility (RACF)

    RACF (Resource Access Control Facility) is the IBM security management product for its mainframe (large server) operating system, OS/390 (MVS) as well as for its VM operating system.

  • Restriction of Hazardous Substances Directive (RoHS Directive)

    The Restriction of Hazardous Substances (RoHS) Directive is a set of criteria formulated by the European Union (EU) to regulate the use of toxic materials in electrical and electronic devices, systems, and toys... (Continued)

  • Rexx

    Rexx is an interpreted script language developed by IBM originally for use by personal users of large operating systems.

  • RPM Package Manager (Red-hat Package Manager)

    RPM Package Manager (also known simply as RPM), originally called the Red-hat Package Manager, is a program for installing, uninstalling, and managing software packages in Linux. RPM was developed on the basis of the Linux Standard Base (LSB). In latter-day usage, the "RPM" portion of this term arises from the fact that .rpm is the default extension for files used by the program.

  • rsync

    Rsync is a free software utility for Unix- and Linux-like systems that copies files and directories from one host to another. Rsync is available on most Linux distributions by default.

  • runlevel

    A runlevel is a Linux operating state that determines which programs can execute when the operating system restarts.

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