Strength of Unix/Linux operating system

Unix/linux has become one of the most strength operating system for Servers. It could happen since this kind of operating system is stable enough to work 24 hours a day, seven days of week. That's why lot of system engineer rely their application and  their company system in Unix/linux operating system. One of reason Unix/Linux become stable operating system because this kind of operating system has complicated calculation to use CPU/RAM usage. Also because lot of Unix/Linux operating system developed with open-source publication method. Spirit of open-source has a big impact for this operating system to be as famous as what we know now. Open source is method of source code of  software to be published to public, so everyone can see, modify, add features or code of the software. That's why we can have lot of distribution of operating system which has Unix/Linux core system within it. Open source operating system also supported by hardware vendor, since sometimes the release hardware that works perfectly with some kind  of open source operating system.