After further reading in the links David suggested I did a googel 'udev /dev/modem' and alas there are a lot of vanishing modems. And there was how to solve the problem: Short of putting ln /dev/ttyS0 /dev/modem into rc.local. Quote I finally found the recipe I needed in a ubuntu forum, using google. What I needed was a file named 10-local.rules placed in the /sda3/etc/udev/rules.d subdirectory. All the file needed was the line following: KERNEL="ttyS1", SYMLINK="modem" Now the modem node in the /dev directory doesn't vanish anymore. Unquote Will try it on next reboot -- Peter - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs