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On 13/04/10 19:41, James Fidell wrote:
I have a Sheevaplug running ubuntu that has a number of USB serial devices connected. On reboots these can be randomly renumbered such that what was for example /dev/ttyUSB0 last time is something else this time. What I'd like to do is to tweak the udev rules in /etc/udev/rules.d such that udev will also create, say, a symlink called /dev/modem for the device that's a modem and /dev/thingy for the one with thingy connected. Presumably I need to have a bit of udev configuration that matches the ttyUSB* device name and compares the device ID to make the correct link. Unfortunately I appear to have become lost in a twisty turny maze of documentation, all alike. Can anyone supply an example of how to do this? Thanks, James
I've done it a while ago with a couple of hard drives, but I'd guess the theory is the same (I used UUID's on the drives IIRC, but I gather it can be used with USB ID's too).
There is a guide here which covers how to do it with discs, it might at least give you some pointers on how to do it with other USB drives.
http://hackaday.com/2009/09/18/how-to-write-udev-rules/ Rob -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html