1.切換到root使用者
# su root
備份原始檔 目錄：/etc/apt
# cd /etc/apt/
# cp sources.list sources.list.bk
3.更換源 阿里源 清華源
# >sources.list # 清空源
# vim sources.list # 選擇乙個源，複製進去
# apt update # 更新源，需要等幾分鐘
# exit # 更新完之後，退出root使用者
阿里源：
deb xenial main restricted universe multiverse
deb xenial-security main restricted universe multiverse
deb xenial-updates main restricted universe multiverse
deb xenial-proposed main restricted universe multiverse
deb xenial-backports main restricted universe multiverse
deb-src xenial main restricted universe multiverse
deb-src xenial-security main restricted universe multiverse
deb-src xenial-updates main restricted universe multiverse
deb-src xenial-proposed main restricted universe multiverse
deb-src xenial-backports main restricted universe multiverse
清華源：
deb bionic main restricted universe multiverse
deb-src bionic main restricted universe multiverse
deb bionic-updates main restricted universe multiverse
deb-src bionic-updates main restricted universe multiverse
deb bionic-backports main restricted universe multiverse
deb-src bionic-backports main restricted universe multiverse
deb bionic-security main restricted universe multiverse
deb-src bionic-security main restricted universe multiverse
deb bionic-proposed main restricted universe multiverse
deb-src bionic-proposed main restricted universe multiverse
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