Ranger is a unique and very handy file system navigator that allows you to move around in your Linux file system, go in and out of subdirectories, view text-file contents and even make changes to files without leaving the tool.
It runs in a terminal window and lets you navigate by pressing arrow keys. It provides a multi-level file display that makes it easy to see where you are, move around the file system and select particular files.
To install ranger, use your standard install command (e.g., sudo apt install ranger). To start it, simply type “ranger”. It comes with a lengthy, very detailed man page, but getting started with ranger is very simple.