Following, the step to install Apex 18.1 to Oracle Database 18.3 on Oracle Linux 7.5.
#STEP1: Download Apex 18.1 http://download.oracle.com/otn/java/appexpress/apex_18.1.zip #STEP2: Verify & Check Apex Installed sqlplus / as sysdba SQL*Plus: Release 18.0.0.0.0 - Production on Dom Set 16 16:49:52 2018 Version 18.3.0.0.0 Copyright (c) 1982, 2018, Oracle. All rights reserved. Connesso a: Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production Version 18.3.0.0.0 SQL> SELECT STATUS, VERSION FROM DBA_REGISTRY WHERE COMP_ID = 'APEX'; STATUS VERSION -------------------------------------------- ------------------------------ VALID 5.1.1.00.08Read moreHow to install Apex 18.1 to Oracle Database 18.3 on Linux