Oracle : Ошибка ORA-02708

"osnrntab: connect to host failed, unknown ORACLE_SID"
*Cause: The invoked Unix two-task driver failed to find an entry in
oratab for the sid you supplied.
*Action: 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.

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