Apply the option permanently
sec_case_sensitive_logon=FALSE
or
sec_case_sensitive_logon=TRUE
Check the parameter
SQL>
show parameter sec_case_sensitive_logon
Note that default value is "TRUE"
sec_case_sensitive_logon=FALSE
or
sec_case_sensitive_logon=TRUE
Check the parameter
SQL>
show parameter sec_case_sensitive_logon
Note that default value is "TRUE"