Ranger is an incredibly handy terminal-based file navigator that[he]#039[/he]s written in Python and is available for Linux and Mac. Ranger allows you to navigate your filesystem using the arrow keys on your keyboard: Up/Down to select files in the current directory (middle pane), and Left/Right to hop back and forth through levels and into directories. When you[he]#039[/he]re focused on a directory, it shows you the contents in the right-hand panel.

Source: LXer – How to use Ranger for navigating files from the command line