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NOS220 Review (Ch6)

Linux Study Guide - Advanced Installation

QuestionAnswer
dd command A Linux command that can be used to write image files to a device such as a USB flash memory drive or hard disk.
disk imaging software Software used to copy sectors between devices. For example, you can use disk imaging software to copy an ISO image to a disk device sector-by-sector, preserving the image’s boot sector. An ISO image copied in this way can be used to start the system BIOS.
disk mirroring A RAID configuration consisting of two identical hard disks to which identical data is written in parallel, thus ensuring fault tolerance. Also known as RAID 1.
disk striping A RAID configuration in which a single file is divided into sections, which are then written to different hard disks concurrently to speed up access time; this type of RAID is not fault tolerant. Also known as RAID 0.
disk striping with parity A RAID configuration that incorporates disk striping for faster file access, as well as parity information to ensure fault tolerance. Also known as RAID 5.
fault tolerant Term used to describe a device that exhibits a minimum of downtime in the event of a failure.
File Transfer Protocol (FTP) The most common protocol used to transfer files across the Internet.
firmware RAID A RAID system controlled by the computer’s BIOS.
hardware RAID A RAID system controlled by hardware located on a disk controller card within the computer.
Hypertext Transfer Protocol (HTTP) The protocol used to transfer information over the Internet.
installation log files The files created at installation to record actions that occurred or failed during the installation process.
Internet SCSI (iSCSI) A SCSI technology that transfers data via TCP/IP networks.
iSCSI initiator The software and hardware components that can be used to transfer files to and from an iSCSI target.
iSCSI target An external iSCSI storage device that hosts one or more hard disks.
ISO image A file that contains an ISO filesystem.
Kickstart Configurator A graphical utility that can be used to create a kickstart file.
kickstart file A file that can be specified at the beginning of a Fedora Linux installation to automate the installation process.
Logical Unit Number (LUN) A unique identifier for each device attached to any given node in a SCSI chain.
Network File System (NFS) A distributed filesystem developed by Sun Microsystems that allows computers of differing types to access files shared on the network.
Overclocked Term used to describe a CPU that runs faster than the clock speed for which it has been rated.
Parallel SCSI The traditional SCSI technology that transfers data across parallel cables.
Redundant Array of Independent Disks (RAID) The process of combining the storage space of several hard disk drives into one larger, logical storage unit.
SCSI ID A number that uniquely identifies and prioritizes devices attached to a SCSI controller.
segmentation fault An error that software encounters when it cannot locate the information needed to complete its task.
Serial Attached SCSI (SAS) A SCSI technology that transfers information in serial mode rather than the traditional parallel mode.
software RAID A RAID system that is controlled by software running within the operating system.
Spanning A type of RAID level 0 that allows two or more devices to be represented as a single large volume.
Storage Area Network (SAN) A group of computers that access the same storage device across a fast network.
target ID See also SCSI ID.
Terminator A device used to terminate an electrical conduction medium to absorb the transmitted signal and prevent signal bounce.
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