| Interface | Description | 
|---|---|
| CommandTester | 
 Interface for class that provides a way to test if a command is installed on the target server OS. 
 | 
| Class | Description | 
|---|---|
| CommandTestResult | 
 Wraps result for a CommandTest execution. 
 | 
| DefaultCommandTester | 
 Default implementation of the  
CommandTester interface. | 
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