1 currently on the market have a common operating system Windows systems, Mac system, linux system.
2 . Linux systems typically serve the business environment. Its characteristics are open (open), multi-user, multi-tasking, a good user interface, excellent performance and stability.
3 . Linux development author, Linux father, Linus Torvalds. When Linux was born in the Netherlands in college students. 1991 0.0.1 version
4 . Open source projects.
People Stallman Sterman, advocates of open source culture.
In 1983 the GNU project
in 1985, FSF Foundation
1990 Emacs, GCC (c compiler language), library
1991 Stallman find Linus, adding that talks so that Linux open-source project (GNU Project)
1992 GNU / Linux
Open Source: Open source code, open source does not mean free (may be service charges).
Closed source: do not open source, other people can not see the source code, some closed-source software for a fee.
5 . Linux has many branches, branches have common: Ubuntu (desktop application), CentOS (remove the billing module, logo, recompiled), RedHat (fee, open source), SUSE, Debian (stable, secure higher), Fedora (free, experimental) and so on.
6 operation and maintenance personnel of the three responsibilities: enterprise data security, business continuity 24/7 to provide services and improve the user experience, experience.
