The system (21.10.2021)
  Operating system: Linux
  Kernel: 5.4.0-89-generic
  Machine: x86_64 (Ubuntu 20.04.4 LTS Server)
  Server software: Apache/2.4.41
  Data collection: Python 3.8.5
  Graph: RRDtool 1.7.2
  Sensors: DS18B20 1-Wire Digital Thermometer