Any Clarifications ?

ORACLE

ORA-01034: ORACLE not available

ORA-27101:  shared memory realm does not exist

SQL*Plus: Release 11.2.0.1.0 Production on Mon Feb 6 11:22:08 2012

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Enter user-name: scott

Enter password:

ERROR:

ORA-01034: ORACLE not available

ORA-27101:  shared memory realm does not exist

Process ID: 0

Session ID: 0 Serial number: 0

Solved................... 

Enter user-name: sys as sysdba

Enter password:

Connected to an idle instance.

SQL> startup

ORACLE instance started.

Total System Global Area  778387456 bytes

Fixed Size                  1374808 bytes

Variable Size             377488808 bytes

Database Buffers          394264576 bytes

Redo Buffers                5259264 bytes

Database mounted.

Database opened.

SQL> connect scott/tiger

Connected.