127.0.0.1	localhost
127.0.1.1	head
::1		localhost ip6-localhost ip6-loopback
ff02::1		ip6-allnodes
ff02::2		ip6-allrouters
192.168.0.1     head
192.168.0.11    node11
192.168.0.12    node12
192.168.0.13    node13
（以下略）