The different types of device drivers used in linux are character device and block device. Is there another classification?
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In the traditional classification, there are three kinds of device:
- block device
- character device
As you can figure out exploring
/dev, there are devices which are not block neither char device. For example, physical net interfaces are not represented by a file in the filesystem and you cannot
write(1) from them the same way you can with your keyboard or your soundcard. The only interfaces present in
/dev are virtual interfaces like
There are also other classifications the kernel linux uses, called "classes". You can see the list of classes under
From the documentation of the kernel:
Each device class defines a set of semantics and a programming interface that devices of that class adhere to. Device drivers are the implementation of that programming interface for a particular device on a particular bus.