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Unable to uninstall Oracle18XE on OL8

V. TaoNov 19 2023 — edited Nov 19 2023

Hi!

I just installed OracleDatabase 18XE on a fresh OL8 system.
It turns out I need to install the 19c version.
To avoid problems, and because it seems the right thing to do, I tried to uninstall the 18XE by doing this:

[oracle@mymachine]$ $ORACLE_HOME/deinstall/deinstall

But get the message:

ERROR: This Oracle home does not seem to be registered.
Deinstall tool cannot proceed.


Then I found this article:
https://docs.oracle.com/en/database/oracle/oracle-database/18/xeinl/deinstalling-oracle-database-xe-software-linux.html#GUID-767CAA48-68EF-4F34-A6FA-0210FFC62

The result:
/etc/init.d/oracle-xe-18c delete
Deleting Oracle Listener.
Deleting Oracle Database XE.
[FATAL] [DBT-10201] Delete database operation cannot be performed.
CAUSE: There are no databases present on the system.

I decided to ignore this because I never set up a database, and followed the instructions, getting this:

yum remove oracle-database-xe-18c
Dependencies resolved.
================================================================================
Package Architecture Version Repository Size
================================================================================
Removing:
oracle-database-xe-18c x86_64 1.0-1 @@System 5.2 G

Transaction Summary
================================================================================
Remove 1 Package

Freed space: 5.2 G
Is this ok [y/N]: y
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Running scriptlet: oracle-database-xe-18c-1.0-1.x86_64 1/1
[SEVERE] An error occured while discovering the configuration of the Oracle home. Verify the deinstall logs for more details.
error: %preun(oracle-database-xe-18c-1.0-1.x86_64) scriptlet failed, exit status 1

Error in PREUN scriptlet in rpm package oracle-database-xe-18c
Verifying : oracle-database-xe-18c-1.0-1.x86_64 1/1

Failed:
oracle-database-xe-18c-1.0-1.x86_64

Error: Transaction failed


Can anyone help?
I'm not a pro, so please let me know if you need more infos.

Thanks!

This post has been answered by dvohra21 on Nov 20 2023
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Added on Nov 19 2023
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