title: Display content of file in zabbix
body: <p>I have zabbix server to monitor linux server, I am trying to read daily backup file and display all contents of file on zabbix, how can I do that.</p>
  
  <p>I tried to do the following:</p>
  
  <p>first item</p>
  
  <p><strong>TYPE: Zabbix_agent (Active)</strong>
  <strong>log[/var/opt/backup,]</strong></p>
  
  <p>second item  </p>
  
  <p><strong>TYPE: Zabbix_agent (Active)</strong>
  <strong>vfs.file.contents[/var/opt/backup]</strong></p>
  
  <p>but there is no data retrieved, and should I do anything in trigger...</p>