I don't know RH in details, but if you didn't change any basic
configuration, there should be no program running on a serial port.

But you can check it with "ps -A" . This will show you the gettys on
tty0 through tty6 and nothing should be on ttyS0 or ttyS1. If there is
something, kill it with the number of the process shown with "ps -A" .
You can get a short list with "ps -A | grep tty".

If you find something running on any serial, look into files
/etc/rc.local and more probably on /etc/inittab for something getting
started by the "init" process.

You can also rename the package, but you'll need to be *very* cautious.
I mean it. You would have to rename the executables and the init
scripts, including the names of the executables inside those scripts. As
Linux cares for upper/lower case, you can simply change one or two
letters for capitals.

The scripts are located in  /etc/rc.d/init.d/  or /etc/init.d/  and
there should be symbolic links in /etc/rc.d/rcX.d with X from 1 to 5 or
6 that also needs to be erased and generated again for the new file names.

Too weird, though.

BTW, have you connected the serial cable?  ;-)  just kidding!!!

Hope this helps
Francisco


Herbert Graf wrote:

>Just bought myself a UPS with Linux support.
>
>I installed the package (called cupsd, which is the identical name of the
>printing daemon in Linux...) and it isn't working. :(
>
>The daemon keeps reporting "UPS connection error".
>
>There is very little documentation that I can find with regards to it.
>However the readme does state the following:
>
>In order to use the package, you must have an available
>serial port.  This serial port should not be running getty or any
>other communications software.  The permissions on the serial
>port should also be changed to mode 600, to prevent malicious
>users from killing the power.
>The possible choice is "/dev/ttyS0" or "/dev/ttyS1".
>
>I have it set to ttyS0.
>
>Anyone know how I go about checking (and removing) the "getty or any other
>communications software" on this port?
>
>I'm running Redhat 9.0.
>
>Thanks for any help. TTYL
>
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