su -<br> groupadd -r scanner<BR><BR> 

  usermod -a -G scanner apache<br> usermod -a -G scanner root<br><br>

With the scanner plugged in, run the lsusb command. You'll get several lines like this:<br>  Bus 001 Device 002: ID 046d:c00e Logitech, Inc. Optical Mouse<br><br>Look for the one that looks like it's for your scanner, and write down the two numbers next to ID (in this case, if the mouse was actually a scanner, 046d and c00e). The left number is the vendor ID, and the right is the product ID. Another option is to look here: http://www.linux-usb.org/usb.ids for your manufacturer and product. Go to /lib/udev. Edit the 50_udev_default.rules file. You're looking for a line like this:  SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0644" (might be mode 0664 instead) This says "when a device is plugged into the USB bus, add a device under /dev/bus/usb/<brBUS NUMBER>called <brDEVICE NUMBER>, with permissions owner (root) RW, and everyone else read only". Add a line above that one that says:

Go to /lib/udev.<br>Edit the 50_udev_default.rules file. You're looking for a line like this:<br><br>SUBSYSTEM BUS="usb", ATTRS{idVendor}=="usb<left number from lsusb>", ENVATTRS{DEVTYPEidProduct}=="usb_device<right number from lsusb>", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0644" (might be mode 0664 instead)<br>This says "when a device is plugged into the USB bus, add a device under /dev/bus/usb/<BUS NUMBER> called <DEVICE NUMBER>, with permissions owner (root) RW, and everyone else read onlyGROUP="scanner".<br><br>

Add a line above that one that says:<br>BUS="usb", ATTRS{idVendor}=="<left number from lsusb>", ATTRS{idProduct}=="<right number from lsusb>", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0664", GROUP="scanner"<br><br>This tells the system "If this SPECIFIC USB device is plugged in, make it mode 664 instead of 644, and make it part of the scanner group.<p>

<b>'''NOTE:</b> ''' The Fedora udev rules look a little different. You should be able to copy the line that looks similar to the BUS="usb" line, paste it, and add the ATTRS and GROUP parts, and check the MODE to make sure it's 0664.