You click both volume down and power buttons at the same time to take a screenshot, if you happen to click the volume down first the volume slider will show up
Secure != stable
Immutable distros aren't always more secure but rather more stable and hard to break
Also btw nixos can apply updates without rebooting
My experience with Ubuntu was filled with bugs and i hated snaps, suggested it to a friend and installed it for him and he kept getting errors and bugs everywhere for some reason, he had the impression that linux is a buggy mess. I'm not suggesting ubuntu to a new user ever again, fedora is the way to go, i just wished they had nvidia drivers in their repos it would have made it easier for new users
You click both volume down and power buttons at the same time to take a screenshot, if you happen to click the volume down first the volume slider will show up