Oracle Problem Solving

In the past few days, You need to deploy a system on Linux as a prototype for system development. The database used by the system is from Oracle 9i Linux. After creating a database and importing data for a long time, I finally thought it was a success. However, when I started the listener, the system reported an error and failed to start, it's really depressing. There was a fear of Oracle. Was it true that some parameters were incorrect during database creation. If you encounter a problem, you are afraid of oracle. After a few hours, I still can't do it. It's a weekend. Forget it. Let's talk about it next week. I returned home with a tired mood. I went to work on Monday, but I still need to fix oracle. It's still an old problem and the listener cannot be started. An instance is replaced by an old database in the system. I still can't do it. Today is Monday, and my mood is still very positive. I think it must be a problem with the machine environment. I suddenly wanted to find the/etc/hosts file, the IP address of the machine is changed to the current IP address. Well, I don't want to fear Oracle any more.