解决：Some index files failed to download. They have been ignored, or old ones used instead.

vi  /etc/network/interfaces    添加nameservers和broadcast 

auto lo  
iface lo inet loopback  
auto eth0 

iface eth0 inet static  
address 192.168.1.58  
gateway 192.168.1.1
network 192.168.1.0  
broadcast 192.168.1.255                 //添加
dns-nameservers 66.212.63.228 66.212.48.10  //添加

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