Connecting to the ARS Recovery Catalog with RMAN When using Oracle Autonomous Recovery Service (ARS / DBRS) for database backups, the connection to the recovery catalog is secured via an auto-generated Oracle Wallet and configured TNS alias. To run manual RMAN operations (such as maintenance, reporting, or manual validation), you need to point your environment to the directory containing the ARS wallet/TNS configuration and connect via the catalog alias. Step 1: Locate and Set the TNS_ADMIN Directory First, identify the directory where your ARS configuration files ( tnsnames.ora , sqlnet.ora , and wallet files like cwallet.sso ) reside. On OCI Database environments (such as Base Database Service or Exadata), these are typically stored under the database cluster file system (ACFS) path. Export the TNS_ADMIN environment variable so RMAN knows where to look for network configuration and credential artifacts: # Verify the directory path containing your ARS credentials [oracle@dev-f...