LINUX下使用.sql脚本，不知道是那里写错了！求解答！

进入oracle用户后获取DBA权限运行.sql文件
sqlplus / as sysdba @create_user.sql
以下是.sql文件命令，主要是用来创建表空间和用户的。
------------------------创建表空间---------------------------
CREATE TABLESPACE ids DATAFILE '/u01/oradata/orcl/ids.dbf' SIZE 200m AUTOEXTEND ON NEXT 300M MAXSIZE UNLIMITED;
-------------------------创建用户----------------------------
CREATE user ids identified by ids default tablespace ids temporary tablespace TEMP profile DEFAULT;
----------------------给用户分配权限-------------------------
Grant dba to ids;
--------------------------提交-------------------------------
commit;

运行.sql文件后报错。
Connected to an idle instance.

CREATE TABLESPACE ids DATAFILE '/u01/oradata/orcl/ids.dbf' SIZE 200m AUTOEXTEND ON NEXT 300M MAXSIZE UNLIMITED
*
ERROR at line 1:
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 0 Serial number: 0

CREATE user ids identified by ids default tablespace ids temporary tablespace TEMP profile DEFAULT
*
ERROR at line 1:
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 0 Serial number: 0

Grant dba to ids
*
ERROR at line 1:
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 0 Serial number: 0

commit
*
ERROR at line 1:
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 0 Serial number: 0

是缺少什么?
求大神解答！