Start Oracle Database on Linux: Complete Guide

In Linux systems, you can start the Oracle database service by following these steps:

1. Open a terminal window and log in as the root user.
2. Navigate to the installation directory for Oracle database, typically found at /u01/app/oracle/product/version/db_1.
3. Switch to the oracle user account
4. Execute the sqlplus command located in the bin directory without logging in.
5. Log in as the system administrator.
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7. Choose the status from the v$instance.

By following the above steps, you will be able to successfully start the Oracle database service on a Linux system.