1. sysdba로 접속
[oracle@spgems ~]$ sqlplus /nolog
SQL*Plus: Release 11.2.0.1.0 Production on Mon Jun 27 16:54:45 2011
Copyright (c) 1982, 2009, Oracle. All rights reserved.
SQL> conn /as sysdba
Connected.
2. Lock 걸린 User 조회
SQL> select username, account_status, lock_date from dba_users;
3. Lock 걸린 User lock 해제
SQL> alter user hr account unlock identified by hr;