Hello .
I perform the check and I get the following error.
usr/lib/check_mk_agent/plugins/mk_oracle -t
<<<oracle_instance>>>
<<<oracle_sessions>>>
<<<oracle_logswitches>>>
<<<oracle_undostat>>>
<<<oracle_recovery_area>>>
<<<oracle_processes>>>
<<<oracle_recovery_status>>>
<<<oracle_longactivesessions>>>
<<<oracle_dataguard_stats>>>
<<<oracle_performance>>>
<<<oracle_locks>>>
<<<oracle_tablespaces>>>
<<<oracle_rman>>>
<<<oracle_jobs>>>
<<<oracle_ts_quotas>>>
<<<oracle_resumable>>>
<<<oracle_instance>>>
<<<oracle_processes>>>
<<<oracle_asm_diskgroup>>>
login----------------------------------------------------------------
Operating System: Linux
ORACLE_HOME (oratab): /oracle/product/11.2.0.4
Logincheck to Instance: CACTUS
Version: 11.2
Logindetails:
CACTUS|FAILURE|ERROR: ORA-12541: TNS:no listener SP2-0751: Unable to connect to Oracle. Exiting SQL*Plus
SYNC_SECTIONS: instance sessions logswitches undostat recovery_area processes recovery_status longactivesessions dataguard_stats performance locks
ASYNC_SECTIONS: tablespaces rman jobs ts_quotas resumable