Monitoring whether Database and Listener are running or not?

Hi,
We have around 50 databases which we manage. Those databases have some alerts which send emails if the tablespaces are below 80% threashold levels.
However, we dont have any alert either if the database is down or if listener is down. Most of the databases are either on sun solaris or on AIX running either oracle 9i or oracle 10G.
I am going through the source code of the scripts already in place. can someone direct me
on how we can monitor whether the database is up and running and whether the given listener is running or not?
Thank you.
Giridhar

You have many databases on many machines. I think you should use Oracle grid,that help you to manage and monitor your databases.
Anyway you need to monitor listener and database only and free....
You can find out open source on internet to help you.
Example: nagios, that can help .... monitor database + listener....

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./addlnctl.sh start PROD
The only thing I can think is that last time the database was used it was crashed out due to the VirtualBox session hanging. As the scripts starting it back up again seemed to run OK I hoped that this didn't cause any long term issue? While obviously not good to be not shut down correctly this kind of issue shouldn't nuke the db should it?
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Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

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Monitoring whether Database and Listener are running or not?

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