title: log monitoring: send email when error occurs
body: <p>I do have some logfiles from a few applications. What I want to do, is to monitor these logfiles and send an email if an error occurs.</p>
  
  <p>The question is how to do such a thing. I have seen a few tools like Splunk, but they are really expensive (it should cost nothing, or only an initial fee).</p>
  
  <p>I am using java and logback does to logging. So for now i use an SMTP appender which directly sends an email in the case of an error. But the problem is, that I cannot make this approach on all applications / servers.</p>
  
  <p>Any help would be highly appreciated!</p>
  
  <p>Cheers</p>