Which Linux distribution should I try after Ubuntu to learn more about Linux?

If you want a more hands-on setup, Arch can teach you about installation, package management, boot configuration, services, and maintaining a system. It’s challenging without being quite as extreme as building everything yourself, but don’t use it as your only machine unless you’re comfortable troubleshooting.

Fedora is a sensible next choice. It feels different enough from Ubuntu to expose you to another package ecosystem and system configuration style, while still being polished and practical for everyday development. You could also consider an atomic Fedora edition if you’re interested in immutable systems.

You don’t necessarily need to switch. Ubuntu can teach you a lot if you start doing more work from the terminal, learn how packages and services are managed, read system logs, and build software from source. A different distribution won’t automatically teach Linux development.

Gentoo, Slackware, Void, and Linux From Scratch are useful if your goal is specifically to understand how systems are assembled and maintained. Linux From Scratch is the most intensive option and can take many hours, so it’s better done in a virtual machine or on spare hardware rather than your main computer. Keep backups and research commands before running them.