# nagios4

> Legacy host/service/networking monitoring program.
> See also: `nagios`, `nagios2`, `nagios3`.
> More information: <https://manned.org/nagios>.

- Start `nagios4`:

`nagios4 /etc/nagios4/nagios.cfg`

- Start `nagios4` in daemon mode:

`nagios4 -d`

- Start `nagios4`, print service check scheduling information to `stdout`, then shutdown:

`nagios4 -s`

- Verify configuration file:

`nagios4 -v`