On Fri, Dec 04, 2009 at 02:22:03PM -0600, James Battat wrote: > > I would like to configure my SL5.3 system so that when a USB device (a > LabJack U3-LV) is plugged in, the group is automatically set to "adm" so > that members of that group can read/write the device. > Here is the magic incantation I use to set permissions on USB-serial devices, it goes into /etc/udev/rules.d/49-usb_chmod_udev.rules Observe the "RUN+=" entry executes the "chmod" command to change device permissions, you may need to change it to "chown" to change ownership. ladd00:~$ more etc_udev_rules.d_49-usb_chmod_udev.rules ACTION=="add", SUBSYSTEM=="usb_device", \ PROGRAM="/bin/sh -c 'K=%k; K=$${K#usbdev}; printf bus/usb/%%03i/%%03i $${K%%%%.*} $${K#*.}'", RUN+="/bin/chmod a+wr /proc/%c" \ NAME="%c", MODE="0666" KERNEL=="ttyUSB*", NAME="%k", GROUP="uucp", MODE="0666", OPTIONS="last_rule" -- Konstantin Olchanski Data Acquisition Systems: The Bytes Must Flow! Email: olchansk-at-triumf-dot-ca Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada