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SCO Unix Serial Communications and UUCP

This article is from a FAQ concerning SCO operating systems. While some of the information may be applicable to any OS, or any Unix or Linux OS, it may be specific to SCO Xenix, Open There is lots of Linux, Mac OS X and general Unix info elsewhere on this site: Search this site is the best way to find anything.

I can't get shared dial-in and dial-out working on SCO Unix

This is an ancient post with no relevance to modern systems.

Here are a few things to keep in mind. Under Unix, the entries in /etc/inittab and /usr/lib/uucp/Devices must match exactly; if one says "ttyi3" while the other says "/dev/ttyi3", getty won't consider them to be the same port, and your modem will not be sent the undialer string.

Serial ports to be used by UUCP (or even just initialized with an undialer) should generally be owned by user uucp and group uucp. If you set it this way but it keeps being put back to something else, chances are you're suffering from the problem mentioned above.

If you have several entries in /usr/lib/uucp/Devices for a port (specifying different dialers for different speeds or whatever), only the first one will actually be used to reset the port. Make sure the first one listed is the one you want - that's usually marked ACU, but local customs may vary.


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