devfs: how do I stop permissions being reset at reboot?

Oliver Grawert ogra at
Mon Mar 13 12:44:56 UTC 2006

Am Montag, den 13.03.2006, 12:41 +0000 schrieb R Kimber:
> I'm trying to run nut with a newly acquired UPS using COM1.  This
> involves doing
> chmod 0600 /dev/ttyS1
> chown nut.nut /dev/ttyS1
> However, these permissions are reset at reboot to
> crw-rw----  1 root dialout 4, 64 2006-03-12 18:02 /dev/ttyS0
> How should I make my own changes permanent?
why dont you just add the nut user to the dialout group ?
apart from that, devfs is obsolete in 2.6 kernels, you want to change
udev rules (even the proper way is the dialout group for your problem)

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