TNS-12541&TNS-12560

Those errors are very common errors. I have this error one of our  EBS r12 instance While I try to start my listener, I have errors, such as: [oraprod@oracle]$ lsnrctl start LISTENER TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 111: Connection refused I noticed that I have a missing entry on Continue reading