How to play with Environment ?

conda create --name <env_name> <package_names>
activate <env_name>
conda deactivate

How to show all of your environments ? 

conda info --envs
conda info -e
conda env list

How to show all packages in current environment ? 

conda list

How to install specified package in current environment ?

conda install <package_name>

How to uninstall specified package in current environment ?

conda remove <package_name>

How to upgrade all packages ?

conda update --all
conda upgrade --all
conda update conda
conda update anaconda
conda update python

How to upgrade your python3.6 to python3.8 ?

conda install python=3.8