ABOUT UDEV udev – Linux dynamic device management udev (userspace /dev) is a device manager for the Linux kernel CONFIG FILE RELATED # do not edit this file, it will be overwritten on update ACTION==”remove”, GOTO=”cdrom_end” SUBSYSTEM!=”block”, GOTO=”cdrom_end” KERNEL!=”sr[0-9]*|xvd*”, GOTO=”cdrom_end” ENV{DEVTYPE}!=”disk”, GOTO=”cdrom_end” # unconditionally tag device as CDROM KERNEL==”sr[0-9]*”, ENV{ID_CDROM}=”1″ # media eject button pressed …