Here is a simple hello world command run using the command

– Please create the following module for command :

app/code/Vendor/Module/registration.php

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="Vendor_Module" setup_version="0.1.0"/>
</config>

• Create a new model class, it will contain the options, description, and logic of your command.

  app/code/Vendor/Module/Model/Generation.php
  

  namespace VendorModuleModel;
  
  use SymfonyComponentConsoleCommandCommand;
  use SymfonyComponentConsoleInputInputInterface;
  use SymfonyComponentConsoleOutputOutputInterface;
  
  class Generation extends Command
  {
      protected function configure()
      {
          $this->setName('custom:create')
               ->setDescription('The description of you command here!');
  
          parent::configure();
      }
  
      protected function execute(InputInterface $input, OutputInterface $output)
      {
          $output->writeln('Hello World!');
      }
  }

  app/code/Andre/Tools/etc/di.xml
  

  <?xml version="1.0"?>
  <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
      <type name="MagentoFrameworkConsoleCommandList">
          <arguments>
              <argument name="commands" xsi:type="array">
                  <item name="create" xsi:type="object">VendorModuleModelGeneration</item>
              </argument>
          </arguments>
      </type>
  </config>

  Now, run upgrade command to register module : bin/magento setup:upgrade

  To run the command, just create :

  bin/magento custom:create.

Then add your own logic under the execute() method.

Please let us know if this article is helpful to you.