编辑/etc/hosts文件，添加域名：
127.0.0.1 localhost 127.0.1.1 ubuntu # The following lines are desirable for IPv6 capable hosts :: ip6-localhost ip6-loopback fe00:: ip6-localnet ff00:: ip6-mcastprefix ff02:: ip6-allnodes ff02:: ip6-allrouters
编辑/etc/hosts文件，添加域名：
127.0.0.1 localhost 127.0.1.1 ubuntu # The following lines are desirable for IPv6 capable hosts :: ip6-localhost ip6-loopback fe00:: ip6-localnet ff00:: ip6-mcastprefix ff02:: ip6-allnodes ff02:: ip6-allrouters