Hello

I'm looking for an application that can help me monitor my ubuntu server and for example send me emails if certain criteria are met.

I imagine an application like Fail2Ban where an regular expression is set up as a filter, and a set of actions can be set up (e.g. emailing) if a match is found for the regular expression in the filter.

But instead of mathing the filter in a log file i imagine that the filter would be matched against the outcome of a system command.
These system commands could for example be smartctl for extracting harddisk temperatures etc.

I like the Fail2Ban concept as it allows for expansion to custom logs as long as you can create the proper regular expression for the filter.

Is there such an application out there?

Regards
Klaus

Something like alerting on harddisk temperature could be taken care of using 'hddtemp' and a cronjob. In terms of reinventing the wheel monitoring output of system commands is something that Nagios can do. Else you could have a look at SEC or Swatch. Else maybe check equivalents / improvements / replacements in Freshmeat, Sourceforge, Nongnu or Berlios.