Directory Permissions and Ownership of $ORACLE_HOME

If the Sun Cluster HA for Oracle fault monitor displays errors like those shown below, make sure that the $ORACLE_HOME directory permissions are set to 755 and that the directory is owned by the Oracle administrative user with group ID dba.

Feb 16 17:13:13 ID[SUNWcluster.ha.haoracle_fmon.2520]: hahost1:HA1: 
 DBMS Error: connecting to database: ORA-12546: TNS:permission denied
 Feb 16 17:12:13 ID[SUNWcluster.ha.haoracle_fmon.2050]: hahost1:HA1: 
 RDBMS error, but HA-RDBMS Oracle will take no action for this error code