I've written a few posts about restarting USB service in Ubuntu before. This is an update to that process for Ubuntu 9.04 (Jaunty) and Ubuntu 9.10 (Karmic).
As of Ubuntu Jaunty, the usb kernel module is called usb_storage. Read more
Why a Bootable USB Drive?
Most computers sold these days don't have a 3.5" floppy drive, yet many computer manufacturers still only provide BIOS flash utilities that require booting to a DOS environment. Luckily there is a free version of DOS called FreeDOS and a utility called UNetbootin to the rescue. Using these two free programs you can create a bootable USB drive that will enable you to flash your BIOS. Read more
I've previously shown how to create a bootable USB drive with Ubuntu and FreeDOS. While the technique in that post is educational, there is a much easier way. Use UNetbootin to do the work for you. Read more
Sometimes you just need a DOS boot disk. Many motherboard manufacturers and computer companies only provide DOS based BIOS update utilities. A further challenge is that many computers no longer have floppy disk drives. The solution is to create a bootable USB drive that boots to FreeDOS. The beauty of this method is that you can create a DOS boot drive using only free software. Read more
I previously did a post on how to Create a Button to Restart USB in Ubuntu. The purpose of that procedure was to get the USB hub in my HP w2207 monitor to recognize a flash drive that had been inserted into one of the ports.
Well I've found a better way to force this recognition that doesn't require root permission. It turns out that issuing the lsusb command polls all of the USB devices and causes my flash drive to be recognized and automounted. You can try this in a terminal with: Read more