Removing Oracle 11g 12c Database Software

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http://download.oracle.com/docs/cd/E11882_01/install.112/e10840/remove_oracle_sw.htm#CEGBAJIA
Oracle 11g Database software utilizes a completely different method of removing the Database software, instead of the the 'traditional' method of the OUI GUI
The full document is in the above link, but in a nutshell, there is a deinstall tool located in $ORACLE_HOME/deinstall called deinstall
There are are a number of options that could be used, -home,-silent,-checkonly,-local etc which are all fully explained in the document.
This completely removes all of the binaries and the related HOME , BASE and oraInventory locations.
However the oraInventory location details still exist in /etc/oraInventory which will still need to be removed
The Agent software can be removed by typing the following and highlighting the agent oracle home and clicking remove
$<ORACLE_HOME>/oui/bin/runInstaller -deinstall -removeallfiles

Removing 12c agent software

/u01/app/oracle/product/agent12c/core/12.1.0.2.0/oui/bin/runInstaller -deinstall ORACLE_HOME=/u01/app/oracle/product/agent12c/core/12.1.0.2.0 -removeallfiles -invPtrLoc /home/oracle/oraInventory/oraInst.loc

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