opt/librenms$ sudo ./validate.php
====================================
Component | Version
--------- | -------
LibreNMS  | 1.32-57-g163d0b4
DB Schema | 211
PHP       | 7.0.22-0ubuntu0.16.04.1
MySQL     | 10.0.31-MariaDB-0ubuntu0.16.04.2
RRDTool   | 1.5.5
SNMP      | NET-SNMP 5.7.3
====================================

[OK]    Database connection successful
[OK]    Database schema correct
[FAIL]  The poller has not run in the last 5 minutes, check the cron job
[WARN]  Some devices have not been polled in the last 5 minutes.
        You may have performance issues. Check your poll log and see: http://docs.librenms.org/Support/Performance/