Speedtest vs ISP and at home

Updated 2020-11-30 ! Sometimes you are doubtful about the performance of your home network, or versus the ISP, and wonder, where is the bottleneck ? After some Googling I found some favorite applications, implemented on a cable connected Raspberry PI(RPi), which do the job so You can start measure and stop guessing. A speedtest, checking Your ISP, with just a bash script for Your home network