如何在centos7里查看usb設備

① 如何在linux下在應用層得到USB設備名稱信息

先獲取一下/dev的列表， 然後得到插播事件後， 在獲取一下當前的/dev列表，然回後做一下比較答 linux系統會自動識別USB介面為串口磁碟sda(通常為sda1，可通過fdisk -l命令查詢)，掛載就可用。

② 怎麼查看linux usb設備驅動

下面的信息都是在VMware中運行Ubuntu12-04系統上執行的。同樣該命令也支持在嵌入式系統中進行USB調試。
一、cat設備節點獲取信息
在一些嵌入式開發中需要調試USB功能，經常會cat /sys 下的相關設備節點來查看某些信息，比如說我們可以看到 /sys/bus/usb/devices 目錄有多個子目錄。進入到某個子目錄可以看到usb設備更加詳細的信息(可以理解為設備描述符)。
1、usb設備在匯流排上的信息
// usb設備在匯流排上的信息
root@ubuntu:/sys/kernel/debug# cd /sys/bus/usb/devices
root@ubuntu:/sys/bus/usb/devices# ll
total 0
drwxr-xr-x 2 root root 0 Nov 26 21:21 ./
drwxr-xr-x 4 root root 0 Nov 26 21:21 ../
lrwxrwxrwx 1 root root 0 Nov 26 21:21 1-0:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-0:1.0/
lrwxrwxrwx 1 root root 0 Dec 15 23:10 1-1 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/
lrwxrwxrwx 1 root root 0 Dec 15 23:18 1-1:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/
lrwxrwxrwx 1 root root 0 Nov 26 21:21 2-0:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-0:1.0/
lrwxrwxrwx 1 root root 0 Nov 26 21:21 2-1 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-1/
lrwxrwxrwx 1 root root 0 Nov 26 21:21 2-1:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-1/2-1:1.0/
lrwxrwxrwx 1 root root 0 Nov 26 21:21 2-2 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/
lrwxrwxrwx 1 root root 0 Nov 26 21:21 2-2:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2:1.0/
lrwxrwxrwx 1 root root 0 Nov 26 21:21 usb1 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/
lrwxrwxrwx 1 root root 0 Nov 26 21:21 usb2 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/
其中 usbx/第x個匯流排，x-y:a.b/的目錄格式，x表示匯流排號，y表示埠，a表示配置，b表示介面。
具體解釋可以參照如下：
The names that begin with "usb" refer to USB controllers. More accurately, they refer to the "root hub" associated with each controller. The number is the USB bus number. In the example there is only one controller, so its bus is number 1. Hence the name "usb1".
"1-0:1.0" is a special case. It refers to the root hub's interface. This acts just like the interface in an actual hub an almost every respect; see below.
All the other entries refer to genuine USB devices and their interfaces. The devices are named by a scheme like this:
bus-port.port.port ...
In other words, the name starts with the bus number followed by a '-'. Then comes the sequence of port numbers for each of the intermediate hubs along the path to the device.
For example, "1-1" is a device plugged into bus 1, port 1. It happens to be a hub, and "1-1.3" is the device plugged into port 3 of that hub. That device is another hub, and "1-1.3.1" is the device plugged into its port 1.
The interfaces are indicated by suffixes having this form:
:config.interface
That is, a ':' followed by the configuration number followed by '.' followed by the interface number. In the above example, each of the devices is using configuration 1 and this configuration has only a single interface, number 0. So the interfaces show up as;
1-1:1.0 1-1.3:1.0 1-1.3.1:1.0
A hub will never have more than a single interface; that's part of the USB spec. But other devices can and do have multiple interfaces (and sometimes multiple configurations). Each interface gets its own entry in sysfs and can have its own driver.
2、特定設備的詳細信息
進入到某個目錄中去，可以看到該設備的詳細信息，可用cat命令獲取信息。
// usb設備的詳細信息
root@ubuntu:/sys/bus/usb/devices/usb1# ll
total 0
drwxr-xr-x 6 root root 0 Nov 26 21:21 ./
drwxr-xr-x 4 root root 0 Nov 26 21:21 ../
drwxr-xr-x 10 root root 0 Nov 26 21:21 1-0:1.0/
drwxr-xr-x 5 root root 0 Dec 15 23:10 1-1/
-rw-r--r-- 1 root root 4096 Dec 15 23:40 authorized
-rw-r--r-- 1 root root 4096 Dec 15 23:40 authorized_default
-rw-r--r-- 1 root root 4096 Dec 15 23:40 avoid_reset_quirk
-r--r--r-- 1 root root 4096 Nov 26 21:21 bcdDevice
-rw-r--r-- 1 root root 4096 Nov 26 21:21 bConfigurationValue
-r--r--r-- 1 root root 4096 Nov 26 21:21 bDeviceClass
-r--r--r-- 1 root root 4096 Nov 26 21:21 bDeviceProtocol
-r--r--r-- 1 root root 4096 Nov 26 21:21 bDeviceSubClass
-r--r--r-- 1 root root 4096 Dec 15 23:40 bmAttributes
-r--r--r-- 1 root root 4096 Dec 15 23:40 bMaxPacketSize0
-r--r--r-- 1 root root 4096 Dec 15 23:40 bMaxPower
-r--r--r-- 1 root root 4096 Dec 15 23:40 bNumConfigurations
-r--r--r-- 1 root root 4096 Dec 15 23:40 bNumInterfaces
-r--r--r-- 1 root root 4096 Nov 26 21:21 busnum
-r--r--r-- 1 root root 4096 Dec 15 23:40 configuration
-r--r--r-- 1 root root 65553 Nov 26 21:21 descriptors
-r--r--r-- 1 root root 4096 Dec 15 23:40 dev
-r--r--r-- 1 root root 4096 Nov 26 21:21 devnum
-r--r--r-- 1 root root 4096 Dec 15 23:40 devpath
lrwxrwxrwx 1 root root 0 Nov 27 20:06 driver -> ../../../../../bus/usb/drivers/usb/
drwxr-xr-x 3 root root 0 Dec 15 23:40 ep_00/
-r--r--r-- 1 root root 4096 Nov 26 21:21 idProct
-r--r--r-- 1 root root 4096 Nov 26 21:21 idVendor
-r--r--r-- 1 root root 4096 Dec 15 23:40 ltm_capable
-r--r--r-- 1 root root 4096 Nov 26 21:21 manufacturer
-r--r--r-- 1 root root 4096 Dec 15 23:40 maxchild
drwxr-xr-x 2 root root 0 Nov 26 21:21 power/
-r--r--r-- 1 root root 4096 Nov 26 21:21 proct
-r--r--r-- 1 root root 4096 Dec 15 23:40 quirks
-r--r--r-- 1 root root 4096 Nov 26 21:21 removable
--w------- 1 root root 4096 Dec 15 23:40 remove
-r--r--r-- 1 root root 4096 Nov 26 21:21 serial
-r--r--r-- 1 root root 4096 Nov 26 21:21 speed
lrwxrwxrwx 1 root root 0 Nov 26 21:21 subsystem -> ../../../../../bus/usb/
-rw-r--r-- 1 root root 4096 Nov 26 21:21 uevent
-r--r--r-- 1 root root 4096 Dec 15 23:40 urbnum
-r--r--r-- 1 root root 4096 Dec 15 23:40 version
二、使用debugfs
1、掛載 debugfs 到 /sys/kernel/debug 路徑下
root@ubuntu:mount -t debugfs none /sys/kernel/debug
2、執行上述步驟之後，在 /sys/kernel/debug 就會生成如下的文件
root@ubuntu:/sys/bus/usb/devices# cd /sys/kernel/debug/
root@ubuntu:/sys/kernel/debug# ll
total 0
drwx------ 22 root root 0 Nov 26 21:21 ./
drwxr-xr-x 7 root root 0 Nov 26 21:21 ../
drwxr-xr-x 2 root root 0 Nov 26 21:21 acpi/
drwxr-xr-x 32 root root 0 Dec 4 16:30 bdi/
drwxr-xr-x 2 root root 0 Nov 26 21:21 bluetooth/
drwxr-xr-x 2 root root 0 Nov 26 21:21 cleancache/
drwxr-xr-x 2 root root 0 Nov 26 21:21 dma_buf/
drwxr-xr-x 4 root root 0 Nov 26 21:21 dri/
drwxr-xr-x 2 root root 0 Nov 26 21:21 dynamic_debug/
drwxr-xr-x 2 root root 0 Nov 26 21:21 extfrag/
drwxr-xr-x 2 root root 0 Nov 26 21:21 frontswap/
-r--r--r-- 1 root root 0 Nov 26 21:21 gpio
drwxr-xr-x 3 root root 0 Nov 26 21:21 hid/
drwxr-xr-x 2 root root 0 Nov 26 21:21 kprobes/
drwxr-xr-x 3 root root 0 Nov 26 21:21 kvm-guest/
drwxr-xr-x 2 root root 0 Nov 26 21:21 mce/
drwxr-xr-x 2 root root 0 Nov 26 21:21 pinctrl/
-r--r--r-- 1 root root 0 Nov 26 21:21 pwm
drwxr-xr-x 2 root root 0 Nov 26 21:21 regmap/
drwxr-xr-x 3 root root 0 Nov 26 21:21 regulator/
-rw-r--r-- 1 root root 0 Nov 26 21:21 sched_features
-r--r--r-- 1 root root 0 Nov 26 21:21 sleep_time
-r--r--r-- 1 root root 0 Nov 26 21:21 suspend_stats
drwxr-xr-x 7 root root 0 Nov 26 21:21 tracing/
drwxr-xr-x 3 root root 0 Nov 26 21:21 usb/
drwxr-xr-x 2 root root 0 Nov 26 21:21 virtio-ports/
-r--r--r-- 1 root root 0 Nov 26 21:21 vmmemctl
-r--r--r-- 1 root root 0 Nov 26 21:21 wakeup_sources
drwxr-xr-x 2 root root 0 Nov 26 21:21 x86/
3、cat 設備節點
執行下述命令之後會以特定格式列印目前USB匯流排上所有USB設備的信息如下：
root@ubuntu:/sys/kernel/debug# cat usb/devices
T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 17/900 us ( 2%), #Int= 1, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0001 Rev= 3.13
S: Manufacturer=Linux 3.13.0-32-generic uhci_hcd
S: Proct=UHCI Host Controller
S: SerialNumber=0000:02:00.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0e0f ProdID=0003 Rev= 1.03
S: Manufacturer=VMware
S: Proct=VMware Virtual USB Mouse
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=1ms
T: Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 3 Spd=12 MxCh= 7
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0e0f ProdID=0002 Rev= 1.00
S: Proct=VMware Virtual USB Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 6
B: Alloc= 0/800 us ( 0%), #Int= 1, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev= 3.13
S: Manufacturer=Linux 3.13.0-32-generic ehci_hcd
S: Proct=EHCI Host Controller
S: SerialNumber=0000:02:03.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 7 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS=64 #Cfgs= 1
P: Vendor=0bda ProdID=0129 Rev=39.60
S: Manufacturer=Generic
S: Proct=USB2.0-CRW
S: SerialNumber=20100201396000000
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=06 Prot=50 Driver=rts5139
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=83(I) Atr=03(Int.) MxPS= 3 Ivl=64ms
至於信息的詳細解析可以參照 Linux源代碼中 Documentation/usb/proc_usb_info.txt 文件。現摘錄其中對該格式的詳細解釋：

| | |__Proct ID code
| |__Vendor ID code
|__Device info tag #2

String descriptor info:
S: Manufacturer=ssss
| |__Manufacturer of this device as read from the device.
| For USB host controller drivers (virtual root hubs) this may
| be omitted, or (for newer drivers) will identify the kernel
| version and the driver which provi

③ Linux怎樣查看一個設備是從哪個USB口接入的

ls -l /sys/bus/usb/devices/
查看下

④ linux操作系統怎麼識別USB介面設備

linux系統會自動識別USB介面為串口磁碟sda(通常為sda1，可通過fdisk
-l命令查詢)，掛載就可用。
例：新專建掛載目錄mkdir
/mnt/usb，掛載mount
/dev/sda1
/mnt/usb，用屬完卸載掛起點unmount
/dev/sda1
/mnt/usb。

⑤ 在linux下 如何找到 插入的USB設備所對應的設備文件呢

插入USB設備後，我的設備是U盤。fdisk -l查看u盤設備在哪個分區，比如是/dev/sdb 然後掛載這個分區到/mnt目錄下就可以訪問該U盤設備了 。其他的USB設備沒用過。

⑥ 在linux系統里，如何檢查新插入的USB設備是否被系統識別

方法一：在/etc/init.d/rcS中添加mount -t usbfs none /proc/bus/usb.
方法二：在shell中輸入mount -t usbfs /proc/bus/usb /proc/bus/usb.
前提是在編譯內核時選中usb device filesystem。
#cat /proc/bus/usb /device
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 1, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0001 Rev= 2.06
S: Manufacturer=Linux 2.6.32.2-ltls ohci_hcd
S: Proct=S3C24XX OHCI
S: SerialNumber=s3c24xx
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 4
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 1.25
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms
T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#= 7 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=ff(vend.) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=160a ProdID=3184 Rev= 2.05
S: Manufacturer=VIA Networking Technologies, Inc.
S: Proct=VNT USB-802.11 Wireless LAN Adapter
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=vntwusb
E: Ad=81(I) Atr=03(Int.) MxPS= 32 Ivl=1ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms

⑦ 請教，Linux怎樣查看usb設備的詳細信息

方法一：在/etc/init.d/rcS中添加mount -t usbfs none /proc/bus/usb.
方法二：在終端中輸入mount -t usbfs /proc/bus/usb /proc/bus/usb.
前提是在編譯內核時選中usb device filesystem。
#cat /proc/bus/usb /device
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 1, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0001 Rev= 2.06
S: Manufacturer=Linux 2.6.32.2-ltls ohci_hcd
S: Proct=S3C24XX OHCI
S: SerialNumber=s3c24xx
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 4
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 1.25
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms
T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#= 7 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=ff(vend.) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=160a ProdID=3184 Rev= 2.05
S: Manufacturer=VIA Networking Technologies, Inc.
S: Proct=VNT USB-802.11 Wireless LAN Adapter
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=vntwusb
E: Ad=81(I) Atr=03(Int.) MxPS= 32 Ivl=1ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms

⑧ linux可以查看usb設備的詳細信息嗎

lsusb
或
lsusb -v

⑨ linux操作系統怎麼識別USB介面設備

linux系統會自動識來別USB介面為串口磁碟sda(通常自為sda1，可通過fdisk -l命令查詢)，掛載就可用。
例：新建掛載目錄mkdir /mnt/usb，掛載mount /dev/sda1 /mnt/usb，用完卸載掛起點unmount /dev/sda1 /mnt/usb。

⑩ 在Linux上怎麼樣查看USB設備

在大多數Linux套件中，硬體識別最常用的兩個工具是Lspci和Lsusb。
Lspci工具可以顯示所有PCI匯流排信息，並列出與它版們權相連的硬體設備。Lspci對於集成音效卡和顯卡的X86主板尤其有用，因為它可以識別使用在主板PCI電路中的確切晶元。
Lsusb工具可提供USB匯流排和連接設備的同類信息。

USB設備一般表示為 /dev/sda 或/dev/hda1 等等

如果是USB存儲器，像硬碟分區那樣直接掛載即可
mount /dev/sda /mnt/sda