我拿到了一个 RFID 阅读器。它的工作方式就像一个简单的键盘输入。因此，如果我打开 texeditor 并扫描一些 RFID，它会将代码打印为文本 =)
我安装了 RFDump，但找不到串行端口。我得到了一个小脚本，可以打印出这个
/dev/video1 - Chicony_Electronics_Co._Ltd._HD_WebCam
/dev/video0 - Chicony_Electronics_Co._Ltd._HD_WebCam
/dev/input/event7 - Chicony_Electronics_Co._Ltd._HD_WebCam
/dev/input/event17 - Sycreader_RFID_Technology_Co.__Ltd_SYC_ID_IC_USB_Reader_08FF20140315
/dev/input/event6 - Logitech_USB_Receiver
/dev/input/mouse1 - Logitech_USB_Receiver
lsusb：
Bus 001 Device 009: ID 08ff:0009 AuthenTec, Inc. SYC ID&IC USB Reader
-v 选项不显示任何额外路径
如果在 RFDump 串行端口中复制该路径 (/dev/input/event17)，它会显示：
Could not initialize RFID reader.
希望这有意义。如果有人能分享一些智慧之言，让它发挥作用，那就太好了
@Sebastian 我运行dmesg| grep 'SYC ID&IC USB Reader'
并输出：
29571.975761] usb 1-2: Product: SYC ID&IC USB Reader
[29571.981465] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:08FF:0009.0004/input/input29
[29572.040908] hid-generic 0003:08FF:0009.0004: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-2/input0
[32328.119438] usb 1-2: Product: SYC ID&IC USB Reader
[32328.124927] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:08FF:0009.0005/input/input30
[32328.183192] hid-generic 0003:08FF:0009.0005: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-2/input0
[35006.291923] usb 1-1: Product: SYC ID&IC USB Reader
[35006.298447] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/0003:08FF:0009.0006/input/input31
[35006.357752] hid-generic 0003:08FF:0009.0006: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-1/input0
[35060.818770] usb 1-1: Product: SYC ID&IC USB Reader
[35060.824270] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/0003:08FF:0009.0007/input/input32
[35060.884200] hid-generic 0003:08FF:0009.0007: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-1/input0
[35189.648009] usb 1-1: Product: SYC ID&IC USB Reader
[35189.653450] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/0003:08FF:0009.0008/input/input33
[35189.713423] hid-generic 0003:08FF:0009.0008: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-1/input0
[37902.519864] usb 1-1: Product: SYC ID&IC USB Reader
[37902.525201] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/0003:08FF:0009.0009/input/input34
[37902.584880] hid-generic 0003:08FF:0009.0009: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-1/input0
[42394.829746] usb 1-2: Product: SYC ID&IC USB Reader
[42394.835174] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:08FF:0009.000A/input/input35
[42394.898900] hid-generic 0003:08FF:0009.000A: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-2/input0
[42890.538133] usb 1-1: Product: SYC ID&IC USB Reader
[42890.543712] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/0003:08FF:0009.000B/input/input36
[42890.607224] hid-generic 0003:08FF:0009.000B: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-1/input0
[43571.255468] usb 1-2: Product: SYC ID&IC USB Reader
[43571.260810] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:08FF:0009.000C/input/input37
[43571.320611] hid-generic 0003:08FF:0009.000C: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-2/input0
[45054.812926] usb 1-2: Product: SYC ID&IC USB Reader
[45054.818268] input: Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:08FF:0009.000D/input/input38
[45054.882301] hid-generic 0003:08FF:0009.000D: input,hidraw3: USB HID v1.10 Keyboard [Sycreader RFID Technology Co., Ltd SYC ID&IC USB Reader] on usb-0000:00:14.0-2/input0
@JayEye
Cannot open /dev/bus/usb/001/009
我发现的是/015（取决于我是否重新插入）
lsusb -v -D /dev/bus/usb/001/015
Device: ID 08ff:0009 AuthenTec, Inc.
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x08ff AuthenTec, Inc.
idProduct 0x0009
bcdDevice 0.08
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0022
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
iInterface 4
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 33 US
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 65
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
当我不使用 sudo 执行此操作时，出现了原始问题。当我使用 sudo 时，弹出窗口：
Serial port not set. Please set the serial port in the preferences or use the -p argument and restart rfdump.
另外，在偏好方面，我在串行端口字段中有一个选项：/dev/ttyUSB0
当退出 sudo 运行时我得到了终端信息：
could not load preferences /root/.config/rfdump.ini : No such file or directory
using /usr/share/rfdump/rfdump.glade
所以我在很多方面都很困惑=)