title: How to create trigger for checking status of application service in zabbix
body: <p>I am new in zabbix and wanted to know if someone knows how to create customize application related trigger in zabbix.
  Below is my logic which I want to use but I've no idea about syntax.</p>
  
  <p>There is a process called "aviation" so I can check the status by using 
  <strong>ps -eaf |grep aviation| wc -l</strong>.
  if above command gives output count as 2 it means my process is running perfectly fine else its down.</p>
  
  <p>Can anyone help me to write an expression for the same.</p>