ORA-12547

"ORA-12547: TNS:lost contact"

Check the permissions of file $ORACLE_HOME/bin/oracle

expected: -rwsr-s--x

if not, change the permissions by chmod 6751 $ORACLE_HOME/bin/oracle

I had -rwxr-x---

And I got the error "ORA-12547: TNS:lost contact"

--

Andrey.