When you were trying to connect to your Oracle database, you received the following errors.
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3640
Additional information: 2007875791
Process ID: 0
Session ID: 0 Serial number: 0
Here are the steps to fix it.
SQL>sqlplus /NOLOG
SQL> connect / as sysdba;
SQL> SHUTDOWN IMMEDIATE
You may get the error message again.
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3640
Additional information: 2007875791
Process ID: 0
Session ID: 0 Serial number: 0
SQL> STARTUP
ORACLE instance started.
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