Shakeout test:

To identify an initial test which verifies that a load has been successful and all software is accessible and functioning as expected.

Unit test:

To test particular functions or code modules. Typically done by the programmer and not by testers

Unit testing: To test the code wheather its basic functionality working properly or not, as per requirment.

Shakeout Testing: To test the Networking functionality, Data base connectivity and the integration of modules.

Both testing is done by Developer or Whitebox tester.