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# execute(withArguments:completionHandler:)

Execute the unix script with the specified arguments.

```
func execute(withArguments arguments: [String]?, completionHandler handler: NSUserUnixTask.CompletionHandler? = nil)
```

## Parameters

`arguments`

An array of `NSString` objects containing the script arguments. The arguments do not undergo shell expansion, so you do not need to do special quoting, and shell variables are not resolved.

`handler`

The completion handler Block that returns the result. See [`NSUserUnixTask.CompletionHandler`](/documentation/Foundation/NSUserUnixTask/CompletionHandler).

## Discussion

This method should be invoked no more than once for a given instance of the class.

If the script completed normally, the completion handler’s `error` parameter will be `nil`.

## See Also

[`standardOutput`](/documentation/Foundation/NSUserUnixTask/standardOutput)

The standard output stream.

[`standardError`](/documentation/Foundation/NSUserUnixTask/standardError)

The standard error stream.

[`init(url:)`](/documentation/Foundation/NSUserScriptTask/init(url:)-2qgls)

Return a user script task instance given a URL for a script file.

[`standardInput`](/documentation/Foundation/NSUserUnixTask/standardInput)

The standard input stream.


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