3.11. Devices and Device Nodes
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## 3.11. Devices and Device Nodes

A device is a term used mostly for hardware-related activities in a system, including disks, printers, graphics cards, and keyboards. When FreeBSD boots, the majority of the boot messages refer to devices being detected. A copy of the boot messages are saved to `/var/run/dmesg.boot`.

Each device has a device name and number. For example, `ada0` is the first SATA hard drive, while `kbd0` represents the keyboard.

Most devices in FreeBSD must be accessed through special files called device nodes, which are located in `/dev`.

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