~ hostname
localhost
~ sudo vim /etc/hosts
127.0.0.1 localhost
255.255.255.255 broadcasthost
保证俩个localhost的一样,如果你的hostname为aaa,则将hosts文件中的localhost改为aaa
~ hostname
localhost
~ sudo vim /etc/hosts
127.0.0.1 localhost
255.255.255.255 broadcasthost
保证俩个localhost的一样,如果你的hostname为aaa,则将hosts文件中的localhost改为aaa