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Can I check an Oracle instance without logging into the Oracle server?

Can you check an Oracle instance to see if it's running without logging into the Oracle server? Learn how to do so in Windows or Linux from expert Brian Peasland.

How can I check whether the Oracle server is up or down from the operating system (Linux/Windows) without logging into the Oracle server (without using Oracle tools)?
In MS Windows, you can check to see if the OracleServiceSID is up and running.

In Linux/Unix, you can verify the SMON (system monitor) is running:

ps –ef | grep smon

In both cases, this will tell you if the instance is up, but not necessarily accessible. There are cases where a user cannot sign on to the database but the above looks like the instance is up and running. To verify things are still ok, you will have to sign on to the database.

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