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In Linux various special files can be found under the directory /dev. These files are called device files and behave unlike ordinary files. The most common types of device files are for block devices and character devices. These files are an interface to the actual driver (part of the Linux kernel) which in turn accesses the hardware. Another, less common, type of device file is the named pipe. The most important device files are listed in the tables below.‌



fd0

First Floppy Drive

fd1

Second Floppy Drive



sda

First hard disk

sdb

Second hard disk

sda1

First partition of the first hard disk

sdb7

Seventh partition of the second hard disk



sr0

First CD-ROM

sr1

Second CD-ROM



ttyS0

Serial port 0, COM1 under MS-DOS

ttyS1

Serial port 1, COM2 under MS-DOS

psaux

PS/2 mouse device

gpmdata

Pseudo device, repeater data from GPM (mouse) daemon



cdrom

Symbolic link to the CD-ROM drive

mouse

Symbolic link to the mouse device file



null

Anything written to this device will disappear

zero

One can endlessly read zeros out of this device


D.1.1. Setting Up Your Mouse

 

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