Should the --mode connection-time mode that Scott suggests to check work, please also check --mode list-tablespacese.
If the last one fails then double check preparation steps at https://labs.consol.de/nagios/check_ora ... e-database. Especially these:
Code: Select all
grant select on SYS.DBA_DATA_FILES to nagios;
grant select on SYS.DBA_FREE_SPACE to nagios;