Server is based on Linux.
Linux a Unix-like operating system assembled under the model of free and open source software development and distribution. As distinguish from other operating systems Linux has no unified official distribution package, it is distributed (in most cases for free) as a number of distributions packages with software for specific needs.
Unix-like operating system — a system assembled under the influence of UNIX.
UNIX — a family of portable, multitasks and multiuser operating systems.
Today UNIX-systems are mainly used on servers and also run on embedded systems.
The most important advantages are:
- Free versions.
- Clear limitation of user's rights or applications' rights.