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Definition
| A rackmount server that has a standard height of 1.75 inches. |
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| A thin form factor used to house server hardware that is installed in a server rack. |
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| A Linux command that can be used to change the root of one Linux system to another. |
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| A RAID configuration consisting of two identical hard disks to which identical data are written in parallel, thus ensuring fault tolerance. Also known as RAID 1. |
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| 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. |
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| disk striping with parity |
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Definition
| 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. |
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| Term used to describe a device that exhibits a minimum of downtime in the event of a failure. |
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| A RAID system controlled by the computer's BIOS. |
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| GRUB (GRand Unified Boot loader) |
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Definition
| The most common boot loader used on Linux systems. It loads and executes the Linux kernel at boot time. |
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Definition
| A RAID system controlled by hardware located on a disk controller card within the computer. |
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| The files created at installation to record actions that occurred or failed during the installation process. |
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| A SCSI technology that transfers data via TCP/IP networks. |
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| A term that refers to the computer that connects to the iSCSI target within an iSCSI SAN. |
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Definition
| A term that refers to a storage device within an iSCSI SAN. |
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Definition
| A command used to configure journald, as well as to view log entries in the journald database. |
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Definition
| A system used to record (or journal) system events on some Linux distributions, such as Fedora 20. |
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Term
| Linux server distribution |
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Definition
| A Linux distribution that contains packages that are useful for Linux servers. |
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Term
| Logical Unit Number (LUN) |
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Definition
| A unique identifier for each device attached to any given node in a SCSI chain. |
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Definition
| A command used to configure software RAID on a Linux system. |
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Definition
| Term used to describe a CPU that runs faster than the clock speed for which it has been rated. |
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Definition
| The traditional SCSI technology that transfers data across parallel cables. |
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Definition
| A thin form factor used to house server hardware that is installed in a server rack. |
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Term
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Definition
| An implementation of RAID level 5 using ZFS, which uses a variable stripe that provides for better performance and fault tolerance. |
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| Redundant Array of Independent Disks (RAID) |
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Definition
| The process of combining the storage space of several hard disk drives into one larger, logical storage unit. |
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Definition
| A number that uniquely identifies and prioritizes devices attached to a SCSI controller. |
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Definition
| An error that software encounters when it cannot locate the information needed to complete its task. |
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Term
| Serial Attached SCSI (SAS) |
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Definition
| A SCSI technology that transfers information in serial mode rather than the traditional parallel mode. |
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Definition
| A RAID system that is controlled by software running within the operating system. |
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Definition
| A type of RAID level 0 that allows two or more devices to be represented as a single large volume. |
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Term
| Storage Area Network (SAN) |
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Definition
| A group of computers that access the same storage device across a fast network. |
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Term
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Definition
| The process of using a live Linux OS to access and repair a damaged Linux installation. |
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Term
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Definition
| A number that uniquely identifies and prioritizes devices attached to a SCSI controller. |
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Term
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Definition
| A device used to terminate an electrical conduction medium to absorb the transmitted signal and prevent signal bounce. |
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Term
| uninterruptible power supply (UPS) |
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Definition
| A device that contains battery storage and is used to supply power to computers in the event of a power outage. |
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Term
| Zettabyte File System (ZFS) |
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Definition
| A high-performance filesystem and volume management software that is often used to create volumes from multiple storage devices on Linux and UNIX systems. |
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Definition
| A command used to configure ZFS filesystem features. |
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Definition
| A series of storage devices that are managed by ZFS. |
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Definition
| A subdirectory on a ZFS volume that can be managed as a separate unit by ZFS. |
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Definition
| A volume created from space within a ZFS pool that contains a ZFS filesystem. |
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Term
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Definition
| A command used to configure ZFS pools and volumes. |
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Term
| SAS transfers data to SCSI disks via parallel cables. True or False? |
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Definition
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Term
Which of the following is used to describe a computer that is used to access an iSCSI hard disk across the network?
a. iSCSI target
b. iSCSI requestor
c. iSCSI initiator
d. iSCSI terminator |
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Definition
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Term
You want to view log files to get information about a problem that occurred during a Linux installation. In which directory will you likely find the log files?
a. /root/log
b. /sys/log
c. /var/log
d. /etc/log |
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Definition
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Term
Which of the following RAID levels is not fault tolerant?
a. RAID 0
b. RAID 1
c. RAID 4
d. RAID 5 |
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Definition
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Term
Which command can you use during a system rescue to switch from the root of the live OS to the root of the Linux system installed on the hard disk?
a. mount
b. sysimage
c. chroot
d. rescue |
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Definition
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Term
Which of the following is not a type of RAID?
a. hardware RAID
b. software RAID
c. firmware RAID
d. serial RAID |
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Definition
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Term
. Where is the /proc filesystem stored?
a. in RAM
b. on the hard disk drive in the / directory
c. on the hard disk drive in the /etc directory
d. on the hard disk drive in the /var directory |
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Definition
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Term
Which RAID level uses striping with parity?
a. 2
b. 4
c. 1
d. 5 |
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Definition
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Term
| RAID-Z is functionally equivalent to RAID level 1. True or False? |
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Definition
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SCSI devices that use an 8-bit-wide data path use _______________.
a. an 8-pin connector
b. a 15-pin connector
c. a 50-pin connector
d. a 68-pin connector |
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Definition
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Term
Which type of RAID is entirely configured during the Linux installation process?
a. hardware RAID
b. software RAID
c. firmware RAID
d. serial RAID |
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Term
What command can be used to create a ZFS volume called test from the space on /dev/ sdb and /dev/sdc that functions like RAID level 1?
a. zpool create test /dev/sdb /dev/sdc
b. zpool create test mirror /dev/sdb /dev/sdc
c. zpool create test raidz /dev/sdb /dev/sdc
d. zpool create test raidz2 /dev/sdb /dev/sdc |
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Definition
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Term
To which directory will the test ZFS volume from the previous question be mounted by the ZFS system?
a. /mnt/test
b. /media/test
c. /zfs/test
d. /test |
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Definition
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Term
Linux servers are typically installed in a rack using rackmount server hardware. Which of the following is used to describe the minimum height of a rackmount server?
a. 1U
b. Series A
c. Type A
d. Level 5 |
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Definition
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Term
Which RAID level is also referred to as mirroring?
a. 0
b. 1
c. 4
d. 5 |
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Definition
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Term
| ZFS volumes are mounted at boot time from entries within /etc/fstab by default. True or False? |
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Definition
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Term
Which of the following could result in a segmentation fault (fatal signal 11) during a Fedora installation?
a. RAM problems
b. overclocked CPU
c. improper device driver
d. all of the above |
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Definition
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Term
SCSI-1 is also referred to as _______________.
a. fast and wide
b. slow and wide
c. slow and narrow
d. fast and narrow |
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Definition
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Term
Which of the following items are you typically required to configure during a Linux server installation? (Choose all that apply.)
a. package selection
b. boot loader configuration
c. system host name
d. update configuration |
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Definition
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Term
Which of the following commands can be used on a Fedora 20 system to view hardware and service startup information during the boot process?
a. less /var/log/boot.log
b. less /var/log/messages
c. less /var/log/syslog
d. journalctl -b |
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