Solved Error when i type a custom command

How i can solve this error ?
I will put my main.php
im brazillian, so i making my plugin in portuguese

 

This one is easy, every variable should be defined somewhere. Can you find where $cmd is?

Rename $cmd to $command, because that is what you get in the method parameters!

 

Hm ok i will try

 

The problem is just, you defined Command as $command in the function parameters and you switched $cmd which is a undefined variable! To fix it, you'll have to switch $command->getName() instead.

 

Anyone else want to paraphrase it?