Baidu Encyclopedia:
The ubuntu system is based on the Debian distribution and the GNOME desktop environment. Ubuntu's goal is to provide the general user with an up-to-date, at the same time fairly stable operating system built primarily from free software, free to use, with community and professional support. Canonical released the new Ubuntu 18.04 LTS in April. The new LTS (Long Term Support) will be a download link optimized for personal, developer and enterprise users . Personally prefer the 16 version, which is compatible with a variety of software download links .
For me, Ubuntu is a good system, especially in the development of the network, he can simulate a large number of network experiments, such as: mininet, man, OpenStack, etc., which is very useful for us to learn the knowledge of the network.