./runInstaller Follow the same screens as Windows: Select Administrator -> Set /u01/app/oracle/product/12.2.0/client_1 -> Install. At the end, run the root script as instructed:
oracle.install.responseFileVersion=/oracle/install/rspfmt_clientinstall_response_schema_v12.2.0 UNIX_GROUP_NAME=oinstall INVENTORY_LOCATION=/u01/app/oraInventory SELECTED_LANGUAGES=en ORACLE_HOME=/u01/app/oracle/product/12.2.0/client_1 ORACLE_BASE=/u01/app/oracle oracle.install.client.installType=Administrator oracle.install.client.customComponents= oracle.install.client.isPortableInstall=false Run the silent installation: install oracle client 12c
After installation, download Oracle SQL Developer (free) or configure your favorite IDE (IntelliJ, DBeaver, VS Code) to use this client for querying your database. Happy querying! su - /u01/app/oracle/product/12
su - /u01/app/oracle/product/12.2.0/client_1/root.sh Create a response file client_install.rsp : A misconfigured client leads to the dreaded ORA-12154:
Oracle Client 12c (version 12.1 or 12.2) is still widely used in production environments, despite newer versions like 19c and 21c being available. Many legacy and mission-critical systems depend on it. However, installing it correctly can be surprisingly nuanced. A misconfigured client leads to the dreaded ORA-12154: TNS could not resolve the connect identifier , connectivity timeouts, or library path errors.
tnsping MYDB Successful output: