Get help on installation from here
Go to the terminal/command_prompt and enter any of the following command
Example: Following command will download 'Europeana Linked Open Data V1.0' data set in HDT (Header, Dictionary, Triples) format
ipfs get QmREamn6v2rdDzGjmxzReC9yhY58idYRztyzbf2jB3RB6h