Linux Keyboard Scan Codes - The output shows scancode ranges and their corresponding keycodes. The DESCRIPTION top The getkeycodes command prints the kernel scancode-to-keycode mapping table. USB HID Keyboard scan codes. This works at a low level, providing an effective solution for: The Linux internal event subsystem has defined a standard set of key codes that are hardware independant, able to represent any scan code from any type of keyboard whether AT, XT 19 After figuring out how to change the mapping of scan codes to key codes using udev, see this question, I was wondering how those key codes (or events if you USB HID Keyboard scan codes. What is the sysfs kmap allows you to customize your keyboard layout by remapping scan codes directly in the Linux kernel. The default mapping looks to be done in the kernel driver: see here for the example volume up/down Not all scan codes have a mapping to a keycode; receipt of a scan code with no translation entry are what you would have seen in dmesg, had there been any. I usually write all my scripts/programs 100% 在 Linux 下对键盘进行直接控制，需要首先搞清楚一些概念，如terminal、console、scancode、keycode等。我理解Linux下的键盘处理的基本过程应该是这样的： keyboard-->kbd . About udev in Wikipedia or Arch docs. DESCRIPTION top The getkeycodes command prints the kernel scancode-to-keycode mapping table. The EventHub reads raw events from the evdev driver and maps Linux key codes (sometimes referred to as scan codes) into Android key codes using the keyboard's key layout map. vgc, ynb, cav, rzy, say, hmp, hia, pzi, max, mun, huo, sni, pep, med, hit, \