Nagios has been around since 2002 and is considered stable software. It is in use by the likes of American Public Media, JP Morgan Chase and Yahoo, just to name a few. It is an enterprise-level ...

for Red Hat Enterprise Linux 6 and 7. Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise ...