Always test the installation using SQL*Plus (if installed):
Applications find the Oracle Client libraries through environment variables. oracle database client 19c
Tech for All 10m Installing Oracle Database Client Using Image File You must run these scripts manually as root when prompted. * Log in as the Oracle installation owner user account ( oracle ). * Do... Oracle Help Center Oracle Database 19c Click “Close” to exit the Oracle Client Installer. * 7.3. 1 Installing Oracle Database Client Patch. The database client of Oracle... Oracle Help Center Oracle Database Instant Client Installation Types In Oracle Database Instant Client 19c, Instant Client and Instant Client Light are the only supported installation types. The Inst... Oracle Help Center Oracle Database Software Requirements To connect to Oracle Database 19c, the following are required: Oracle Database Client is version 11.2. 0.4 or later. If the earlie... Oracle Help Center Oracle Database 19c Introduction and Overview 4 Feb 2019 — Always test the installation using SQL*Plus (if installed):
The Instant Client is the lightweight champion. It requires no installation wizard and a minimal disk footprint. 1 Installing Oracle Database Client Patch
Why does this matter for the Client?