请问关于oracle10g for solaris10的问题

[weixin_38078293]

Sun Microsystems Inc.   SunOS 5.10      s10_55  May 2004
# sqlplus

SQL*Plus: Release 10.1.0.3.0 - Production on Mon Dec 6 15:34:02 2004

Copyright (c) 1982, 2004, Oracle.  All rights reserved.

Enter user-name: sys
Enter password:
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Intel SVR4 UNIX Error: 2: No such file or directory


Enter user-name:

请问这是怎么回事啊？