OEM 13cR3 - De-Installation - 13.3.0.0

In this blog I cover how to de-install OEM 13cR3 installation. 

Login using oracle account or OMS owner account.
The proces is to copy  the uninstall utility to tmp directory and run using perl. 
You will be asked for credentials of Database sys user, sysman and Admin (weblogic) so keep them handy
 
export ORACLE_HOME=/u01/app/oracle/em13cr3/middleware 
cd /tmp
cp $ORACLE_HOME/sysman/install/EMDeinstall.pl /tmp
$ORACLE_HOME/perl/bin/perl /tmp/EMDeinstall.pl -mwHome $ORACLE_HOME -stageLoc /tmp
 
Refer to /tmp/deinstall_2018-07-11_02-29-42.log for deinstall log
Substring valuye is /u01/app/oracle/em13cr3/gc_inst
This is a First OMS install. So, this deinstalls the OMS , Repository and Agent. Confirm (y/n)y
User confirmed for deinstallation.

Enter the SYS Password :
Enter the sysman Password :
Enter the Admin Server password 
.
.
.

Deleting the em home
The deinstallation of OMS is successful.

The location of the file is : /etc/oragchomelist



Finally if the database is not required, it can be dropped