Nagios can be applicable to a wide range of applications. They are given here −

• Monitor host resources such as disk space, system logs etc.

• Monitor network resources – http, ftp, smtp, ssh etc.

• Monitor log files continuously to identify infra-issue.

• Monitor windows/linux/unix/web applications and its state.

• Nagios Remote Plugin Executer (NRPE) can monitor services remotely.

• Run service checks in parallel.

• SSH or SSL tunnels can also be used for remote monitoring.

• Send alerts/notifications

• via email, sms, pager of any issue on infrastructure

• Recommending when to upgrade the IT infrastructure.