The Raspberry Pi is a credit-card-sized single-board computer with a quad-core processor, 1GB of RAM, four USB ports, and 802.11n wireless LAN. A monitor can be connected via an HDMI port.
Together with the case, cooler, 16GB microSD card, and a powerful power adapter for connecting an external 1TB hard drive, this computer currently costs around €80. An external USB hard drive makes sense for offloading the .var partition, with its constantly rewritten files, to a more stable medium than the SD card. Excessive write operations can quickly age SD cards. Furthermore, a sufficiently large hard drive offers the possibility of using this server as a backup server.
First, the LITE IMG file without a desktop with a Debian-Linux-Image is required.