Download the desired Oracle Instant Client zip files. Select the correct platform, architecture, and packages of your choice. For example, if your application is 64-bit, then ensure that you select 64-bit Instant Client and download the Basic Package zip file.
All installations require a Basic or Basic Light package. All other packages are optional.
Unzip each zip file into a single directory such as /opt/oracle/instantclient_21_1 that is accessible to your application. For example, for Linux x86-64:
$ cd /opt/oracle $ unzip instantclient-basic-linux.x64-21.1.0.0.0.zip
The various packages unzip into /opt/oracle/instantclient_21_1.
Optionally, add the variable to configuration files such as ~/.bash_profile and to application configuration files such as /etc/sysconfig/httpd.
If you intend to colocate optional Oracle configuration files such as tnsnames.ora, sqlnet.ora, ldap.ora, or oraaccess.xml with Oracle Instant Client, then move these files to the network/admin subdirectory.
This is the default Oracle configuration directory for applications linked with this Oracle Instant Client.
Alternatively, you can move the Oracle configuration files to another, accessible directory. Then set the environment variable TNS_ADMIN to that directory name.
To use binaries such as sqlplus from the SQL*Plus package, unzip the package to the same directory as the Basic package and then update your PATH environment variable. For example:
Log in as the Oracle installation owner user account ( oracle ). Download the Oracle Database Client installation zip file to a directory of your choice. For example, you can download the zip file to the /tmp directory. Extract the client zip file and use the runInstaller command to start the installation.
Set PATH to the instantclient_21_1 directory. For example, update PATH in Control Panel, System, Advanced System Settings, Advanced, Environment Variables, System Variables, PATH. If necessary, set the NLS_LANG environment variable.
Extract the files (Copy & Paste or Drag & Drop) to a convenient location like your Desktop (for tidiness, create a new folder first) Once the operation is complete, open the new location and double-click the installer (usually setup.exe or <program name>.exe) Follow the prompts to install your software.
Instant Client's advantages are that installation is a quick unzip of a ZIP package, or the trivial install of Linux RPM packages. Instant Client's footprint is much, much smaller than the full Oracle Client. Other advantages are that it is available under an OTN license that allows redistribution.
You can navigate to the installation directory and look for particular files to confirm the software's presence. Or, you can use command line tools like tnsping or SQL*Plus to check for a connection with an Oracle database. You can also check the Windows Registry to check if the Oracle client is installed.
The default location of the client configuration file depends on the operating system that is used by the federated system: On Linux® and UNIX systems, the default location of the file is $ORACLE_HOME/network/admin. On Windows systems, the default location of the file is %ORACLE_HOME%\NETWORK\ADMIN.
You can install Oracle Instant Client by downloading either the zip files or RPMs from the Oracle Instant Client download page on Oracle Technology Network (OTN).
On cmd, type echo %ORACLE_HOME% . If ORACLE_HOME is set it will return you the path or else it will return %ORACLE_HOME% . There you will find a "file" called HOME; open it and you will see where Oracle was installed.
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