Unixcop published a tutorial about installing APEX and ORDS on CentOS 8.
Install APEX and ORDS on CentOS 8
Oracle Application Express is a low-code development platform that enables you to build scalable, secure enterprise apps, with world-class features, that can be deployed literally anywhere. Also it’s a proprietary web-based integrated development environment (IDE) developed by Oracle Corporation for creating and managing Oracle databases and other related database functionality.
