How to upgrade to Oracle Database 18c from 12c on Linux

Following, the step to upgrade an Oracle Database 12c to a new Oracle Database 18c (version 18.3)  

During the upgrade, the database can’t provide any service because will be open with “upgrade” option. Ensure to have a database backup before apply the upgrade. 

We are used an an Oracle Linux 7.5 environment.

#STEP1: Download Oracle Database 18.3 release
https://www.oracle.com/technetwork/database/enterprise-edition/downloads/oracle18c-linux-180000-5022980.html

#STEP2: Install the software 
Open Linux Desktop or setting X11
mkdir /oracle/product/18
cd /oracle/product/18
unzip LINUX.X64_180000_db_home.zip
export ORACLE_HOME=/oracle/product/18
./runInstaller




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