PING sirius-2.mti.tul.cz (147.230.21.73) 56(84) bytes of data.
64 bytes from sirius-2.mti.tul.cz (147.230.21.73): icmp_seq=1 ttl=59 time=20.8 ms
64 bytes from sirius-2.mti.tul.cz (147.230.21.73): icmp_seq=2 ttl=59 time=18.5 ms
64 bytes from sirius-2.mti.tul.cz (147.230.21.73): icmp_seq=3 ttl=59 time=18.4 ms

--- sirius-2.mti.tul.cz ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 18.457/19.292/20.853/1.110 ms