Everyone here is grabbing popcorn, so I think I'll just start. Built in package manager. Full control and customization . No ads. Open source. Effective workflow. Most dev environments were planned for Linux initially. Lightweight (arch linux, debian, lubuntu, and many more), so capable of running smoothly on older hardware. Bash is way faster than powershell, and don't even joke about batch language, please. It's not even a language. Nice, rock solid and stable file system (ext4). Teaches beginners to be very careful when they run commands such as rm -rf / or chmod 600 / / I use it, so it must be good!! :P Get to brag about it! Unlike Windows, reboot doesn't solve 95% of the issues. So you actually have to know your system and the problem to solve it. Vast and diverse community. Here's a funny and very true illustration.. There you go.