(that's the period key) to unhide ... You'll see that hidden files and folders look a little grayed out compared with normal files and folders, making them easier to identify.

SSH keys are placed in the ‘.ssh’ folder inside your Home folder (it is a hidden ... the Randomart file is designed to match the Fingerprint but be easier to visually identify that it is ...

You can reveal these hidden system files with a lesser-known keyboard shortcut. In the Finder, press Command-Shift-period (that’s the “.” or period key). This toggles the hidden-files state ...