Character devices and Block devices

There are two main types of devices under Linux systems, block devices and character devices.

Character Devices	Block Devices
The devices that conveys data character by character between the device and the user program.	The devices that read/write data in fixed size blocks.
Eg: Mouse, Keyboard	Eg: USB, Hard Disk
No buffering is performed	Block devices are accessed through a buffer
The first character is ‘c’ in the output of ls -l cd to /dev and run the command ls -l	The first character is ‘b’ in the output of ls -l cd to /dev and run the command ls -l