How to install Salesforce Apex Data Loader?
To install Apex Data Loader, follow the below steps

1. Log into Salesforce.com using your credentials,
2. Go to Setup menu
3. Under Administration Setup -> Data Management -> Data Loader
4. Click ‘Download the Data Loader’ to download and install the Apex Data Loader in your system.

You can use Data Loader in two different ways:

• User interface
• Command line