修改/etc/sysctl.conf文件,添加如下配置:

net.ipv4.tcp_rmem=4096 87380 110592

然后执行

sysctl -p

让配置生效

vi /etc/network/interfaces

dns-nameserver 114.114.114.114

vi /etc/resolvconf/resolv.conf.d/base

nameserver 114.114.114.114

然后重启网络

service networking restart