ORA-02708

Error: ORA-02708: osnrntab: connect to host failed, unknown ORACLE_SID

Causa: The invoked UNIX two-task driver failed to find an entry in ORATAB for the SID you supplied.

Acción: First, check whether you have read access to ORATAB, and see if the desired sid is there. Add an entry to ORATAB for the desired SID, if necessary.