Cannot login to Oracle 9i on Linux7.1

Hello....

I have installed Oracle9i database server Enterprise Edition on my Linux 7.1 system. At the end of installation, in Oracle configuration Assistant, I have succeed to change the users' (sys and system) passwords. The post installation configuration is complex. I am not very confident for some configurations. After I install Oracle 9i, I have the problem to login as any kind of user, including sys and system. Could you please help me to solve this problem?
The following is the response when I logined.

[oracle_at_localhost oracle]$
[oracle_at_localhost oracle]$ sqlplus

SQL*Plus: Release 9.2.0.1.0 - Production on Thu Aug 1 08:17:06 2002

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

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

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

Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied

SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus
[oracle_at_localhost oracle]$

Any suggestions would be greatly appreciated.

Frank
Hungxin_at_btnet.com.au Received on Mon Jun 16 2003 - 03:08:43 CDT