When I tried to download and install Oracle client 19c, it was my surprise that there are two different versions. See the following information from the oracle site: So, what is the difference between these two versions?. After some research I found that: LINUX.X64_193000_client.zip is the normal (before 19c) installer-based client software, where you can choose … Continue reading What is the difference between Oracle Client 19c and Oracle Client Home 19c?
TNS-04012: Unable to start Oracle Connection Manager instance.
Background: One advantage of the "Connection Manager" is that it can act as if a proxy server between the database client and the database server, especially when there is a firewall between the client and the server.I installed Oracle Client 19c (only the "Connection Manager" and the "Oracle Net Listener" components): https://www.youtube.com/watch?v=R-tSVkRckfs Then I configured … Continue reading TNS-04012: Unable to start Oracle Connection Manager instance.