If you have pip installed you can install selenium by executing the following command on the CLI.
pip install selenium
or depending on your permissions you may use:
sudo pip install selenium
pip is a more reliable package installer than easy_install as it was built to improve easy_install.
I would also suggest that when creating new projects you do so in virtual environments, even in a simple Selenium project. You can read more about virtual environments here. In fact, pip is included out of the box with virtualenv(virtualenv is a tool to create isolated Python environments. Since Python 3.3, a subset of it has been integrated into the standard library under the venv module.)
If you want to Learn What is Selenium visit this Selenium Interview Questions by Intellipaat.
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