You can use programs in different languages, including Python, Node.js, PHP, Ruby, R, Go, and Perl to connect to an Autonomous Database instance using TLS authentication without a wallet.

1. Install Oracle Instant Client.
   1. Got to the Oracle Instant Client page and click Download Now: Oracle Instant Client
   2. On the Oracle Instant Client Downloads page, select your platform.

      For example, under Instant Client for Linux, select the Instant Client for Linux x86-64 architecture (for this example, to download the Linux x86-64 version).

   3. Under Version 19.14.0.0.0 (Requires glibc 2.14), select an Instant Client package to download.
   4. If you are building a language API or driver from source code, you may also need to download the Instant Client SDK Package version 19.14: Oracle Instant Client
   5. Unzip the base package you selected. If you also download the SDK, unzip it in the same directory.
   6. On Linux, create a symbolic link if it does not exist. For example:

      cd /home/myuser/instantclient_19_14
      ln -s libclntsh.so.19.1 libclntsh.so

      If there is no other Oracle software on your system that will be impacted, add Instant Client to the runtime link path. For example:

      sudo sh -c "echo /home/myuser/instantclient_19_14 > /etc/ld.so.conf.d/oic.conf"
      sudo ldconfig
      

      Alternatively set the library path in each shell that runs your application. For example:

      export LD_LIBRARY_PATH=/home/myuser/instantclient_19_14:$LD_LIBRARY_PATH

      Note
      
      The Linux Instant Client download files are available as .zip files or .rpm files. You can use either version.
2. Install the relevant language driver for Oracle Database:

   • Node.js : To install node-oracledb for Node.js,, use the instructions on the following page: Installing node-oracledb.

   • ROracle: To install ROracle for R, use the instructions on the following page: ROracle

   • PHP: To install PHP OCI8 for PHP, use the instructions on the following page: Configuring PHP with OCI8.

     Windows DLLs are available on http://php.net/downloads.php and are also available from PECL oci8.

   • PHP PDO_OCI: To install PHP PDO_OCI for PHP, use the instructions on the following page: Oracle Functions (PDO_OCI).

     Windows DLLs are available on http://php.net/downloads.php included in PHP.

   • Ruby: To install ruby-oci8 for Ruby, use the instructions on the following page: Install for Oracle Instant Client

   • DBD for Perl: To install DBD::Oracle for Perl, set ORACLE_HOME and your library search path such as LD_LIBRARY_PATH or PATH to the Instant Client directory and use the instructions on the following page: Installing DBD-Oracle.

   • Python: For instructions for connecting Python applications, see Connect Python Applications Without a Wallet (TLS)

3. If you have not already done so, enable TLS connections on your Autonomous Database instance.

   See Update your Autonomous Database Instance to Allow both TLS and mTLS Authentication for details.

4. Run Your Application
   1. Update your application to connect using your database username, your password, and the Oracle Net connect name given in the unzipped tnsnames.ora file. For example, user, adb_user, password, and db2022adb_low as the connect string.
   2. Alternatively, change the connect string in tnsnames.ora to match the string used by your application.
   3. Run your application.