1. Verify that client networking connections are functional. Clients must be able to login to sql*plus with username/password/host string (where host string is the alias created for the specific sid).
i.e.: username: <dbuser>
password: <dbpassword>
host string: <connectstring>
-or- username: <dbuser>/<password>/<connectstring>
2. Login as oracle user and add scripts at the end of the glogin.sql script . It should be located in the $ORACLE_HOME/sqlplus/admin
[oracle@localhost admin]$ vi glogin.sql
--Add below line and save this file.
set sqlprompt "_user '@' _connect_identifier:SQL > "
[oracle@localhost admin]$ cat glogin.sql
--
-- Copyright (c) 1988, 2005, Oracle. All Rights Reserved.
--
-- NAME
-- glogin.sql
--
-- DESCRIPTION
-- SQL*Plus global login "site profile" file
--
-- Add any SQL*Plus commands here that are to be executed when a
-- user starts SQL*Plus, or uses the SQL*Plus CONNECT command.
--
-- USAGE
-- This script is automatically run
--
set sqlprompt "_user '@' _connect_identifier > "
[oracle@localhost admin]$ sqlplus / as sysdba
SQL*Plus: Release 12.2.0.1.0 Production
Copyright (c) 1982, 2016, Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
SYS @ ASRBLG :SQL >
