How can I enable usbfs in Ubuntu 13.04? I could not find the usb/devices file in default path, which is:
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Usbfs has been deprecated for a long time already. It was disabled since Ubuntu 9.10 (but you could recompile the kernel to get it --
CONFIG_USB_DEVICEFS=y). In the Linux kernel it was completely removed in 3.5 so it is completely missing since Ubuntu 12.10.
So the bad news is that you cannot enable usbfs in Ubuntu 13.04 if you do not replace the kernel for an older or patched one.
It seems that the similar content as was in
/proc/bus/usb/devices is now available in
/sys/kernel/debug/usb/devices. Other interesting places to check for the content from former usbfs are:
See also for example Where is usb/devices file in Ubuntu 9.10?