The listener supports no services

This morning I try to connect oracle server from client Oracle SQL Developer, throw me an error :
ORA-12505 error:TNS listener does not currently know of SID given in connection
Check the lsnrctl status on server side


[root@localhost admin]# lsnrctl
LSNRCTL for Linux: Version 12.1.0.1.0 - Production on 12-MAR-2014 10:31:59
Copyright (c) 1991, 2013, Oracle.  All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 12.1.0.1.0 - Production
Start Date                12-MAR-2014 10:28:15
Uptime                    0 days 0 hr. 3 min. 45 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/12.1.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.155)(PORT=1521)))
The listener supports no services
The command completed successfully
LSNRCTL>


Try to register the local listener


[root@localhost admin]# sqlplus sys/***** as sysdba
SQL*Plus: Release 12.1.0.1.0 Production on Wed Mar 12 10:32:48 2014
Copyright (c) 1982, 2013, Oracle.  All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options


SQL>alter system set local_listener='(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.155)(PORT=1521)))';

System altered.


restart the listener and check status again, service started
[root@localhost admin]# lsnrctl status
LSNRCTL for Linux: Version 12.1.0.1.0 - Production on 12-MAR-2014 11:31:04
Copyright (c) 1991, 2013, Oracle.  All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 12.1.0.1.0 - Production
Start Date                12-MAR-2014 10:33:56
Uptime                    0 days 0 hr. 57 min. 7 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/12.1.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.155)(PORT=1521)))
Services Summary...
Service "orcl.localdomain" has 1 instance(s).
  Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB.localdomain" has 1 instance(s).
  Instance "orcl", status READY, has 1 handler(s) for this service...
Service "pdborcl.localdomain" has 1 instance(s).
  Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully


try to connect from Oracle SQL Developer tools , it's work fine.
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ORA-65096: invalid common user or role name

SQL> create user garey identified by 123123;
create user garey identified by 123123
            *
ERROR at line 1:
ORA-65096: invalid common user or role name

SQL> show con_name
CON_NAME
------------------------------
CDB$ROOT
SQL> select pdb from v$services;
PDB
------------------------------
PDBORCL
CDB$ROOT
CDB$ROOT
CDB$ROOT
CDB$ROOT
SQL>


we need to decide whether create common user or a local user,
to create a common  user , the name must start with c##


SQL> create user c##garey identified by 123123;
User created.
SQL>


to create a user in orcl
SQL> alter session set container=PDBORCL;
Session altered.
SQL> create user garey identified by 123123;
User created.
SQL>