Trigger program with ops$account

Question

Hello rvgv and  Edstevens ;
please see trigger program output and my doubts. please clear it.
Session 1
SQL> show user;
USER is "SYS"
SQL> alter user  ops$red  identified by red;
User altered.
SQL> grant dba to ops$red;
Grant succeeded.
Session 2
$ whoami
  red
$ export ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1
$ export PATH=$PATH:$ORACLE_HOME/bin
$ export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
$ export ORACLE_SID=orclprod
$ sqlplus /
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Jun 22 15:41:45 2013
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> show user;
USER is "OPS$RED"
SQL> select count(*) From session_privs;
  COUNT(*)
       161
I have  two problems here ..
select * from user_login;
USERNAME
ISDBA
EXTERNAL_NAME
AUTHENTICATION_TYPE
HOST
SESSION_ID
LOGIN_DATE
LOGIN_TIME
OPS$RED
FALSE
RED
OS
LINUXSERVER
711
22-JUN-13
14:06:52
OPS$RED
FALSE
RED
OS
LINUXSERVER
712
22-JUN-13
14:06:31
OPS$RED
FALSE
RED
OS
LINUXSERVER
713
22-JUN-13
14:06:15
OPS$RED
FALSE
RED
OS
LINUXSERVER
714
22-JUN-13
14:06:20
OPS$RED
FALSE
RED
OS
LINUXSERVER
715
22-JUN-13
14:06:06
Question 1 :
If user identified by password .. that user will be  database authenticated user.
but ops$red  - still being OS authenticated account. - why ?
Question 2 :
Sysdba already granted  DBA privilege to ops$red.
but still showing  ISDBA=FALSE

Answer 1

Ok . i got it. and one more doubt also, Thanks  sybrand_b , sb  and all
$ sqlplus  /
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Jun 22 19:47:32 2013
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> show  user;
USER  is  "OPS$RED"
SQL> disconnect
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> !
$ sqlplus  /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Jun 22 19:49:01 2013
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
SQL> show user;
USER is ""
For ops$<user> account :  if  they use  SQL>sqlplus  /nolog  when  connecting to  the database
           oracle is ignoring to show username. any specific reason for this ?