Why Anaconda does not recognize conda command?

For Windows
Go to Control Panel\System and Security\System\Advanced System Settings then look for Environment Variables.

Your user variables should contain Path=Path\to\Anaconda3\Scripts.

You need to figure where your Anaconda3 folder is (i.e. the path to this folder) . Mine was in C:\Users.

For Linux
You need to add conda to PATH. To do so, type:

export PATH=/path/to/anaconda3/bin:$PATH.

Same thing, you need to figure the path to anaconda3 folder (Usually, the path is stored in $HOME)

If you don't want to do this everytime you start a session, you can also add conda to PATH in your .bashrc file:

echo 'export PATH=/path/to/anaconda3/bin:$PATH' >> ~/.bashrc
source ~/.bashrc