There are a few reasons you might want to set up password-less login via SSH. Manual login For manual login, typing your password over and over is a pain—especially if you're doing this frequently.
Raspberry Pi Gadget Mode
Program your Pi without a keyboard, monitor, or network connection
Which version of Raspbian do I have?
Whether you're using a Raspberry Pi desktop or headless, you'll likely need to open a Linux shell at some point.
If you are using Windows on your PC, it may be easier to code or program by running Linux or another Unix-based operating system alongside Windows.
This short guide will show you how to check how much free space your Raspberry Pi has.
Finding guides