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1. There are too many oracle Oracle installations online, so I'm not going to repeat them. I'm just going to explain the connection.

I used the virtual machine server 2016. After the host reinstalled the system, it took most of the time to reinstall and configure client, so I would like to record it here. I hope there will be fewer detours in the configuration in the future.

two。 Install oracle client.

3. Configure oracle client network

If the reinstallation of the virtual machine results in a change in the server address, the data of listerner.ora and tnsnames.ora will be rewritten to the oracle file.

Just take a look at the SID,KEY,Service Name (the later net manager is usually configured automatically).

HOST, this item, needs to modify the cost of the IP address.

(the client of Oracle is installed on the host, then) check the host configuration net manager information.

OK if the data is consistent with the previous configuration.

Oracle connection

Generally, when using oracle installation files, oracle automatically configures variables and firewalls

Variables:

Here I have created a new OH to make it easier to change the address later.

Firewall:

Then you can open the host connection.

Summary

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