December 2016
Intermediate to advanced
300 pages
6h 36m
English
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Handling device files
Linux has had a long history of device managers. Initially, administrators needed to make sure that the device nodes were already present on the file system (/dev was part of the persisted file system). Gradually, more dynamic approaches were used for device management.
Nowadays, device files are managed through a combination of a pseudo file system (devtmpfs) and a user space device manager called udev. This device manager has been merged in systemd as well, becoming systemd-udevd.
Note
There are projects, such as eudev, which provide udev functionality without requiring systemd to be installed and enabled on the system.
The device manager listens on a kernel socket for kernel events. These events inform the device manager about ...
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