RuntimeException during New theme Installation

Question

I have installed magento 2 and previously working on default Luma theme. Now I am trying to install new free theme in my magento. But when I am using below command:

php bin/magento setup:upgrade –keep-generated

It shows an error:

RuntimeException Too many arguments.

Theme is visible under: Content > Theme & Content > Configuration section in admin panel. But my theme Design section is not visible under Stores > Configuration > General > Design section.

Please help me out. I am new to magento 2 and trying to learning about magento 2

Answer 1

Remove –keep-generated from your command,

You have to just run command,

php bin/magento setup:upgrade

After Upgrade command, Run deployment command,

php bin/magento setup:static-content:deploy

Remove var folder and check.

Answer 2

Read the fact about --keep-generated with setup:upgrade.

The optional --keep-generated option should be used only in limited circumstances by experienced system integrators. --keep-generated should never be used in a development environment.

Improper use of this optional parameter can cause errors during code execution.

–keep-generated command is worked on only on production mode or default mode.

So check your mode of Environment by run this command - php bin/magento deploy:mode:show

Change your mode of environmentby run this command - php bin/magento deploy:mode:set

You can solve your issue by using setp:upgrade command only.

Remove your var/generation directory and run php bin/magento setup:static-content:deploy command.

For more reference refer this link - http://devdocs.magento.com/guides/v2.0/install-gde/install/cli/install-cli-uninstall.html