kb77: Unix registration fails with uname error

If you attempt to add the Unix application and it fails with the uname error below, make sure that you can ssh (rexec can be used if ssh is not enabled) to the target and run the uname -a command:

This collection is not registered. Error when registering a collection. Check Error Log for more details.
Fail to execute the command: uname -a
java.io.IOException: Server closed connection