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Linux is an open source operating system, launched in 1991 for computers, but its use has expanded to support systems for cars, phones, web servers and, more recently, networking equipment. Its longevity, maturity and security make it one of the most reliable operating systems available today, which means that it is ideal for commercial network devices, as well as for companies that want to use it and its peripherals to customize their own network infrastructure and data centers. This in turn makes GNU / Linux System Engineer skills highly sought after by IT hiring managers. Many of the new technologies associated with DevOps, for example, containers, OpenSource infrastructure and SDN controllers are based on GNU / Linux. So what is GNU / Linux? GNU / Linux, an operating system similar to Unix, is distributed under open source licenses, which means that the following rules apply that make it attractive to businesses: GNU / Linux operating system is free to run. Administrato