为什么 ping 结果中的某些行包含主机名？

Question

PING (ip) 56(84) bytes of data.
64 bytes from (ip): icmp_seq=1 ttl=116 time=22.3 ms 
64 bytes from (ip): icmp_seq=1 ttl=116 time=22.3 ms 
(hostname) 64 bytes from (ip): icmp_seq=1 ttl=116 time=22.3 ms 
(hostname) 64 bytes from (ip): icmp_seq=1 ttl=116 time=22.3 ms 
64 bytes from (ip): icmp_seq=1 ttl=116 time=22.3 ms 
(hostname) 64 bytes from (ip): icmp_seq=1 ttl=116 time=22.3 ms 
64 bytes from (ip): icmp_seq=1 ttl=116 time=22.3 ms 

Answer 1

这看起来是 的默认行为ping。根据手册页，您可以添加-n选项以仅获取数值而不解析主机名。