system 계정이 잠겼을 때 푸는 법

C:\Users\user>sqlplus/nolog

SQL*Plus: Release 11.2.0.2.0 Production on 일 7월 1 19:33:44 2018

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

SQL> conn/as sysdba
Connected.
SQL> alter user system identified by <새로운 비밀번호>;

User altered.

SQL> alter user sys identified by <새로운 비밀번호>;

User altered.

커맨드 창을 열어 입력해주면 끝.