將里面的內容都刪掉,替換成阿里云的源 因為換了幾個源都發現還是會出現 index files failed to download的錯誤 所以我用了網上的幾個源組合在一起
#deb包deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse ##測試版源 deb http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse # 源碼 deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse ##測試版源 deb-src http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse # 更新的源的內容# deb http://mirrors.aliyun.com/ubuntu/ raring main restricted universe multiverse
# deb http://mirrors.aliyun.com/ubuntu/ raring-security main restricted universe multiverse
# deb http://mirrors.aliyun.com/ubuntu/ raring-updates main restricted universe multiverse
# deb http://mirrors.aliyun.com/ubuntu/ raring-proposed main restricted universe multiverse
# deb http://mirrors.aliyun.com/ubuntu/ raring-backports main restricted universe multiverse
# deb-src http://mirrors.aliyun.com/ubuntu/ raring main restricted universe multiverse
# deb-src http://mirrors.aliyun.com/ubuntu/ raring-security main restricted universe multiverse
# deb-src http://mirrors.aliyun.com/ubuntu/ raring-updates main restricted universe multiverse
# deb-src http://mirrors.aliyun.com/ubuntu/ raring-proposed main restricted universe multiverse
# deb-src http://mirrors.aliyun.com/ubuntu/ raring-backports main restricted universe multiverse
先復制好內容 vi linux命令行用d鍵刪除行,用滾輪中鍵或shift+Insert來粘貼內容
重新配置DNS; sudo emacs/vi /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 114.114.114.114
naemserver 8.8.8.8
#阿里的DNS
nameserver 223.5.5.5
nameserver 223.6.6.6