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karel@Karel-Ubuntu:~$ ping 127.0.0.1 -c 10
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_req=1 ttl=64 time=0.045 ms
64 bytes from 127.0.0.1: icmp_req=2 ttl=64 time=0.054 ms
64 bytes from 127.0.0.1: icmp_req=3 ttl=64 time=0.052 ms
64 bytes from 127.0.0.1: icmp_req=4 ttl=64 time=0.045 ms
64 bytes from 127.0.0.1: icmp_req=5 ttl=64 time=0.053 ms
64 bytes from 127.0.0.1: icmp_req=6 ttl=64 time=0.054 ms
64 bytes from 127.0.0.1: icmp_req=7 ttl=64 time=0.051 ms
64 bytes from 127.0.0.1: icmp_req=8 ttl=64 time=0.050 ms
64 bytes from 127.0.0.1: icmp_req=9 ttl=64 time=0.054 ms
64 bytes from 127.0.0.1: icmp_req=10 ttl=64 time=0.048 ms
--- 127.0.0.1 ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 8999ms
rtt min/avg/max/mdev = 0.045/0.050/0.054/0.008 ms