101 Determine and configure hardware settings Flashcards

1
Q

HAL Hardware Abstraction Layer

A

HAL Daemon The Hardware Abstraction Layer (HAL) Daemon, or hald is a user space program that runs at all times (that is, as a daemon) that provides other user space programs with information about available hardware.

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1
Q

D-Bus The Desktop Bus (D-Bus)

A

Communicates between the hardware and software devices in Linux

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2
Q

udev

A

udev is the device manager for the Linux kernel. Primarily, it manages device nodes in /dev. It is the successor of devfs and hotplug, which means that it handles the /dev directory and all user space actions when adding/removing devices, including firmware load.

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3
Q

sysfs

A

The sysfs virtual filesystem, mounted at /sys, exports information about devices so that user space utilities can access the information.

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4
Q

hald

A

The Hardware Abstraction Layer (HAL) Daemon, or hald, is a user space program that runs at all times (that is, as a daemon) that provides other user space programs with information about available hardware.

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5
Q

/sys

A

The sysfs virtual filesystem, mounted at /sys, exports information about devices so that user space utilities can access the information.

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6
Q

/proc

A

This is an unusual directory because it doesn?t correspond to a regular directory or partition. Instead, it?s a virtual filesystem that?s created dynamically by Linux to provide access to certain types of hardware information that aren?t accessible via /dev.

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7
Q

/dev

A

Because Linux treats most hardware devices as if they were files, the OS must have a location in its filesystem where these device files reside. The /dev directory is that place. It contains a large number of files that function as hardware interfaces. If a user has sufficient privileges, that user may access the device hardware by reading from and writing to the associated device file. The Linux kernel supports a device filesystem that enables /dev to be an automatically created virtual filesystem?the kernel and support tools create /dev entries on-the-fly to accommodate the needs of specific drivers. Most distributions now use this facility.

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8
Q

modprobe

A

automatically loads kernel modulesto any depended-on modules .

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9
Q

lsmod

A

shows how much memory each module consumes.

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10
Q

lspci

A

PCI Devices = You can learn manufacturers? names and various configuration options by using these commands.

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11
Q

lsusb

A

USB Devices = You can learn manufacturers? names and various configuration options by using these commands.

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