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You might get the bellow erros during Oracle DB installation, or, when trying to connect Oracle DB:

ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist

One of the main causes of this error is due to a wrong setting in the hosts file under /etc folder.

To solve this error, first check what is the server IP address, by running the command:

# ifconfig

From the output, copy the value of the “inet addr” parameter (for example: 10.0.0.1).

Edit the hosts file under /etc folder. Add a new line, and set the host and IP, for example:

arik 10.0.0.1

Save and try again.

 

Good Luck

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Oracle Database 11g Express Edition is free and can be download from here:

http://www.oracle.com/technetwork/products/express-edition/downloads/index.html

I’ve installed the DB on Oracle linux 6, but the explanation is good for other Linux x86-64 platform as well.

After you’ve downloaded the DB’s .rpm file, follow the next steps, in order to install the DB:

(more…)

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Oracle Database 11g Express Edition is free and can be download from here:
http://www.oracle.com/technetwork/products/express-edition/downloads/index.html

Please follow the next steps in order to install the DB:

(more…)

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