PING openstack-kr.github.io (185.199.108.153) 56(84) bytes of data.
64 bytes from cdn-185-199-108-153.github.com (185.199.108.153): icmp_seq=1 ttl=61
time=4.87 ms
64 bytes from cdn-185-199-108-153.github.com (185.199.108.153): icmp_seq=2 ttl=61
time=4.99 ms
64 bytes from cdn-185-199-108-153.github.com (185.199.108.153): icmp_seq=3 ttl=61
time=4.88 ms

--- openstack-kr.github.io ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.874/4.917/4.991/0.096 ms