Oracle报错：ORA-01034 and ORA-27101解决方案
SQL*Plus: Release 11.2.0.1.0 Production on Sat Sep 29 19:56:45 2012 Copyright (c) 1982, 2010, Oracle. All rights reserved. Enter user-name: 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 SQL> shutdown immediate ORA-01034: ORACLE not available ORA-27101: shared memory realm does not exist Linux Error: 2: No such file or directory SQL> startup open Solution of this problem is not complete. The actual issue can come from if installation does not creates the correct pfile for the SID so create the correct SID pfile. See following. Enter user-name: sys as sysdba Enter password: Connected to an idle instance. ORACLE instance started. Total System Global Area 636100608 bytes Fixed Size 1301784 bytes Variable Size 301990632 bytes Database Buffers 327155712 bytes Redo Buffers 5652480 bytes Database mounted. Database opened. SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> startup open ORACLE instance started. Total System Global Area 636100608 bytes Fixed Size 1301784 bytes Variable Size 301990632 bytes Database Buffers 327155712 bytes Redo Buffers 5652480 bytes Database mounted. Database opened. SQL> quit Then log back on using the username and password you created during the installation.
参考：https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:670632200346093489