因为上谷歌的原因,mac os x的hosts改坏了,找到默认内容,记录下:
#
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
fe80::10 localhost