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Linux Plus > Chapter 3 > Flashcards

Chapter 3 Flashcards

1
Q

IRQ

A

Interrupt Request

Signal sent to the CPU instructing it to suspend its current activity and to handle some external event/input

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2
Q

ISA

A

Industry Standard Architecture

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3
Q

PCI

A

Peripheral Component Interconnect

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4
Q

I/O Addresses

A

unique locations in memory that are reserved for communications between the CPU and specific physical hardware devices

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5
Q

DMA

A

Direct memory addressing

Method of communication to I/O ports. Permits the device to transfer data directly without the CPU’s attention resulting in lower CPU activity

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6
Q

LBA

A

Linear Blocking Address

common scheme used for specifying the location of blocks of data stored on computer storage devices, generally secondary storage systems such as hard disks.

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7
Q

Sysfs

A

virtual file system mounted at /sys

exports information about devices so that user-space utilities can access the information

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8
Q

HAL Daemon

A

Hardware Abstraction Layer Daemon

user-space program that runs at all times and provides other user-space programs with information about available hardware

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9
Q

D-Bus

A

Desktop Bus

Provides a further abstraction of hardware information access. Runs as a daemon. D-bus enables processes to communicatie with each other as well as to register to be notified of events

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10
Q

udev

A

a virtual filesystem, mounted at /dev, which creates dynamic device files as drivers are loaded and unloaded

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11
Q

lspci option

-v

A

Increases verbosity of output. This option way be doubled (-vv) or tripled (-vvv) to produce yet more output

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12
Q

lspci option

-n

A

Displays information in numeric codes rather than translating the codes to manufacturer and device names

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13
Q

lspci option

-nn

A

Displays both the manufacturer and device names and their associated numeric codes

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14
Q

lspci option

-x

A

Displays the PCI configuration space for each device as a hexadecimal dump. This is an extremely advanced option. Triple (-xxx) or quadrupling (-xxxx) this option displays information about more devices

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15
Q

lspci option

-b

A

shows IRQ numbers and other data as seen by devices rather than as seen by the kernel

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16
Q

lspci option

-t

A

Displays a tree view depicting the relationship between devices

122

17
Q

lspci option

-s[[[[domain]:]bus]:][slot][.[func]]

A

Displays only devices that match the listed specification. This can be used to trim the results of the output

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18
Q

lspci option

-d [vendor]:[device]

A

Shows data on the specified device

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19
Q

lspci option

-i file

A

Uses the specified file to map vendor and device IDs to names. (The default is /usr/share/misc/pci.ids.)

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20
Q

lspci option

-m

A

Dumps data in a machine-readable form intended for use by scripts. A single -m uses a backward-compatible format, whereas doubling (-mm) uses a newer format

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21
Q

lspci option

-D

A

Displays PCI domain numbers. These numbers normally aren’t displayed

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22
Q

lspci option

-M

A

Performs a scan in bus-mapping mode, which can reveal devices hidden behind a misconfigured PCI bridge. This is an advanced option that can be used only by root

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23
Q

lspci option

–version

A

Displays version information

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24
Q

Kernel Modules

A

Kernel Drivers that handle hardware in Linox

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25
Q

modprobe option

-v or –verbose

A

displays extra information about its operations.

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26
Q

modprobe option

-n or –dry-run

A

causes modprobe to perform checks and all other operations except the actual module insertions

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27
Q

modprobe option

-r or –remove

A

reverses modprobe’s usual effect; it causes the program to remove the specified module and any on which it depends

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28
Q

modprobe option

-f or –force

A

forces the module loading even if the kernel version doesn’t match what the module expects

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29
Q

modprobe option

–show-

A

shows all of the modules on which the specified module depends

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30
Q

modprobe option

-l or –list

A

displays a list of available options whose names match the wildcard you specify.

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Linux Plus (10 decks)

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