Cant run commands in terminal magento 2

Question

When try run command in terminal example php bin setup:upgrade show like these error messages. Not only that but also all commands

-[ReflectionException] Class Magento\Config\Console\Command\ConfigSet\ProcessorFacadeFactory does not exist. - [ReflectionException] Class Magento\Config\Console\Command\ConfigSet\ProcessorFacadeFactory does not exist. - [RuntimeException] Can't create directory /var/www/html/robolk/generated/code/Magento/Config/Console/Command/ConfigSet/. in [Magento\Config\Console\Command\ConfigSet\ProcessorFacadeFactory].

Why is Magento showing these errors?

Answer 1

You need to Set permission in Var like ...

Sudo chmod 0777 -R var/ generated/

If sudo not working then just ..

chmod 0777 -R var/ generated/

Answer 2

I think you are on Magento 2.2+ which has generated folder on root

so for that you have to give 0777 permission to 3 folders

pub, var, generated

chmod 0777 -R var/ generated/ pub/

Also you need to check that server user has enough permission to create files and folder

Answer 3

You need to provide 777 or 775 file/folder permission to

var and pub and generated

That is

sudo chmod 0777 -R var/ pub/ generated/ if you have sudo access

if have normal access then

chmod 0777 -R var/ pub/ generated/

directory for your webserver user (like apache) and the current user of CLI both