Hi all, I am encountering a very strange problem. I created some symbolic link in the /dev directory, like this:

lrwxrwxrwx 1 root root 13 29 set 09.54 /dev/ttyM100 -> tty_dgrp_M1_0

I need this link because the new serial port driver creates all the devices with a different name and I have to mantain the compatibility with my old software.
Sometimes I realize that the software is no more able to use the devices, so I go into the /dev directory and I discover that the links are no more present.
Someone can help me?

Thanks a lot
Marco

This happens because the contents of the /dev directory only exist in RAM. Any files you create or put in there will disappear upon rebooting.

You need to make these changes via a udev rule.