root@debian-buster-armhf:~# speedtest-cliRetrieving speedtest.net configuration…Cannot retrieve speedtest configurationERROR: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)> W takim wypadku sprawdzamy czy mamy i jeśli nie instalujemy ca-certificates aptitude install ca-certificates