Verify checksum on Oracle Solaris:

digest -a sha256 <download_directory>/OracleDeveloperStudio12.5-IDE-Desktop.zip

Verify checksum on Oracle Linux:

sha256sum <download_directory>/OracleDeveloperStudio12.5-IDE-Desktop.zip

Unpack distribution:

cd <installation_directory>; unzip <download_directory>/OracleDeveloperStudio12.5-IDE-Desktop.zip

which unpacks the contents into the directory: <installation_directory>/devstudio

The Oracle Developer Studio IDE Desktop is a client distribution that works in conjunction with the Oracle Developer Studio compilers and debugger to provide a complete C/C++ application development environment. The IDE Desktop client accesses Oracle Developer Studio compilers and debuggers installed on either Oracle Solaris or Linux systems.  

If you do not already have the Oracle Developer Studio compilers and debuggers installed, visit the Downloads tab on the Oracle Developer Studio Oracle Technology site.
Once the Oracle Developer Studio product is installed, complete the Remote Host setup in the IDE Desktop by one of following methods:

• Launch the New Remote Host Setup Wizard accessed directly from the IDE Start page
• Use the Remote Development Tool Bar which is located top left corner of the IDE and select the Manage Hosts menu item from the pull-down list
• Use the File->Open Remote File->Manage Hosts menu item

Find more information on configuring the build hosts and setting up your projects to use a remote build host :

• In the IDE selecting the Help->C/C++ Remote Desktop Distribution menu item gives you complete documentation on IDE Remote capability.
• Review the Technical Articles in the IDE section on the Oracle Developer Studio Oracle Technology site.