How to uninstall the oracle database cleanly

To completely uninstall the Oracle database, follow these steps: Stop the database service. Uninstall the package. Delete the directory. Delete users and groups. Delete log files. Clean the database directory. Reset permissions. Uninstall Listener. Check the uninstallation status.

How to completely uninstall the Oracle database

To completely uninstall the Oracle database, please follow these steps:

1. Stop the database service

• Use the following command to stop all Oracle services:

<code>$ sudo service oracle-xe stop</code>

2. Uninstall the software package

• Depending on how you installed Oracle, use the appropriate command to uninstall the package.

For RPM system:

<code>$ sudo rpm -e oracle-xe</code>

For DEB system:

<code>$ sudo apt-get purge oracle-xe</code>

3. Delete the directory

• Delete the Oracle installation directory and all its subdirectories:

<code>$ sudo rm -rf /usr/lib/oracle</code>

4. Delete users and groups

• Delete users and groups created by Oracle:

<code>$ sudo groupdel oinstall
$ sudo userdel oracle</code>

5. Delete log files

• Delete Oracle log files:

<code>$ sudo rm -rf /var/log/oracle</code>

6. Clean up Database directory

• Clean the Oracle database directory, including data files, redo logs and control files:

<code>$ sudo rm -rf /u01/app/oracle/oradata</code>

7. Reset permissions

• Reset Oracle user and group permissions:

<code>$ sudo chown -R root:root /etc/oracle
$ sudo chmod -R 755 /etc/oracle</code>

8. Uninstall Listener

• Uninstall Oracle Listener:

<code>$ sudo rm -rf /etc/oracle/listener</code>

9. Check the uninstallation

• Use the following command to check whether Oracle has been completely uninstalled:

<code>$ find / -name oracle</code>

If the command does not return any results, Oracle has been successfully uninstalled.

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