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Device Files

Located in the /dev Directory

QuestionAnswer
Device files located in this directory /dev
Directory contains files for all tpyes of DEVICES, even those that don't exist on the system /dev
Device files represent devices, they also indicate how: data is transferred to that device
Devices, like storage devices, that receive data in BLOCK transfers by using memory to buffer the transfers are called: block devices
Devices that send data transfers CHARACTER-by-CHARACTER are called: character devices
Files that identify hard drives /dev/sd{a}{partitionNumber} - sda1
Used to identify the CD-ROM in the system - is just a symbolic link to sr0 /dev/cdrom
Identifies floppy drive files - numbering begins at 0 /dev/fd0 =first floppy drive
Identifies local terminals on the system - numbering begins at 0 /dev/ttyI = file for second terminal
Identifies SERIAL ports on the system - numbering begins at 0 /dev/ttyS1 = second serial port
Identifies PARALLEL ports on the system - numbering begins at 0 /dev/lp1 = second parallel port
USB devices have their own sub-directory of files to support up 127 USB devices /dev/USB/fileName
File for the PS/2 mouse ort /dev/psaux
Identifies files for SCSI tape devices - numbering begins at 0 /dev/st0
Created by: johnadream