Configure Oracle TNS names file

C:\Oracle\product\10.1.0\Client_1\network\ADMIN\tnsnames.ora

# tnsnames.ora Network Configuration File: C:\Oracle\product\10.1.0\Client_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

ORADB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = linux1.schoolnet.com)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = ORADB.schoolnet.com)
)
)