Ubuntu Linux is a Linux-based operating system for personal computers, tablets and smartphones. There is also a Server version which is used on physical or virtual servers in the data center.
Debian is very well suited for application servers, web servers, file servers, hypervisors (personally, we use Proxmox for some hypervisors and this is based on Debian), and much more. It can run on various CPU architectures and scales well from large to small. We have Debian DNS servers running on Raspberry Pis, and large application and database servers running on powerful Debian installs in our racks.
If you want an OS that is rock solid, easy to manage, and predictable, Debian might be the OS you're looking for. The official packages are generally far from being bleeding edge versions, but this means that you are using packages that are battle tested and will not break compatibility at any point during its life-cycle. This, to me, is one of Debian's core strengths and a good reason for recommending it to others.
On the flip-side, the lack of up-to-date versions of various packages may be an annoyance if you actually do need to be using the latest version of such a package. If you need to be using more modern versions, you will need to remedy that yourself or look at an alternative distribution. Ubuntu may be worth a look, in this case, being that it is basically Debian with newer packages and some minor differences here and there.
Personally, I would not recommend Debian for a graphical desktop OS. You'll nearly always be better off with one of the Ubuntu flavors for a modern desktop with all the bells and whistles you'd expect with a GUI desktop.
For a regular not tech savvy user, Ubuntu [Linux] is a piece of cake once installed, and for the tech savvy, super simple to install. And even for the not as tech savvy it is easy.
Server specs don't need to be great, it'll run on anything, though what cpu/memory you'll need depends on your use case.
I'd like to see Canonical REALLY betting on desktop Linux and move one step forward with innovation in that area to improve user adoption.
Desktop UI decisions have been not-so-happy in the past. The ability to move back and forth with Unity has pushed a lot of users in favor of options. Having REAL desktop environment options is something to improve as well.
Improvements in interoperability with other OSes would be very welcome. Sometimes it's just hard to communicate with MacOS or Windows across some protocols. Maybe it's due to the private nature of these protocols, but alternatives are around, we just need to compile and improve them.
Debian is one of the most well-thought-out, logical, and intuitive Linux operating systems you can use. Configuration, package management, file system layouts, etc, are all based on many years of usage, and it's very rare to find anything surprising or confusing in everyday usage. Package management and updates are handled by APT in such a way that once configured, you can almost guarantee your system will behave as expected for the lifetime of its service. Top-notch system integration provides all the tools you'd expect from a modern Linux system, with all the stability you demand from a demanding server OS.
I gave it 10 out of 10 because it allows me to do the work I need on a server, such as running a website and database, and making developments. In addition, thanks to its easy and useful interface during installation, it can be easily installed. In addition, thanks to its easily accessible documents, when a problem occurs, it can be solved easily and quickly.
We did not use the managed commercial support, but instead relied on community forums and official documentation. Ubuntu is very well documented across both instructional documentation from the developers themselves as well as informal support forums [ServerFault, YCombinator, Reddit]. It's easy enough to find an answer to any question you may have
A viable, free, widely used alternative to any modern operating systems on the market. Ubuntu [Linux] is constantly improved, has an enormous user base, a very good community. It's one of the most advanced Linux distributions of today, and can be highly customized to the point that almost any requirement can be filled with it.
