Owing to our roots in the ISP business, systems administration for Unix systems and, to some degree, networking gear, has been an integral part of our business for many years. Our customers value our encompassing know-how in this area and gladly leave these often somewhat sensitive and delicate matter to us. Our task is then to ensure a robust and hassle-free operation, and so far, we have a very good track record doing so.
Since we like to take a structured approach also in this area, alongside the ability to define and maintain quality, and achieve scalability, we are currently using Ansible or Salt.
We mainly deal with Debian and OpenBSD, but increasingly pay attention to CentOS as well.