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What does a system administrator actually do?

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  • What does a system administrator actually do?
He is a professional who is responsible for network setup, annual maintenance of servers (mail servers and file servers) and much more. His or her responsibilities include providing a reliable working environment, in-depth knowledge of software, hardware and networks. He or she has to design, organise and modify while maintaining operating systems, business applications, security tools, web servers, emails, laptops and desktops, but in fact it's a never-ending list.