'There are no commands defined in the "setup" namespace : Magento 2

I have installed latest version of Megento 2, everything is working fine frontend, backend and functionality.

I have one issue with bin/magento setup:upgrade command, when I run this command in terminal I get below exception .

[InvalidArgumentException]
There are no commands defined in the "setup" namespace.

Screenshot :

Is there any thing I missed during installation or I need to install some package to let it working?

Solution 1:^[1]

Giving full control (read/write/execute) to var and pub directory should solve this issue.

sudo chmod -R 777 var pub

You may also try running the command using sudo.

sudo php bin/magento setup:upgrade

Solution 2:^[2]

I wanted to add an answer because the others doens't cover all the problems that could generate this error :

There are no commands defined in the "setup" namespace.

in general.

This error could be caused by permission as said in others answer but we could have other scenario.

The absense of : etc/module.xml
An error in /etc/module.xml or in /etc/di.xml or others xml extensions under /etc

If you know other scenario please comment this answer.
Hope this help.

Solution 3:^[3]

Just remove all the directory of var and remove pub/static directory , it will work bin/magento setup:upgrade

Solution 4:^[4]

I encounterd the same error while running commands related to magento. I was missing double_quotes(") in module.xml file of the custom module. So check module.xml file for any typos and setup_version.

Solution 5:^[5]

I want to add one more hint check the 'MAGE_MODE' value in env.php it should be correctly set.

Solution 6:^[6]

The reason for this error can be seen in the command output: php -f bin/magento.

This will work for most errors like There are no commands defined in the "..." namespace..

A fairly common cause is an error in the VendorName/ModuleName/etc/config.xml.

Solution 7:^[7]

simple RUN php bin/magento this will show you details where it is broken

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Mukesh Chapagain
Solution 2	Isky
Solution 3	Tim Diekmann
Solution 4	vilas
Solution 5	Ahmer Saeed
Solution 6	Victor S.
Solution 7	Asad Ullah

'There are no commands defined in the "setup" namespace : Magento 2

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