1.開啟終端使用root使用者
sudo susudo vim /etc/apt/sources.list在sources.list檔案末尾新增
deb trusty main universe restricted multiverse#中科大源
deb bionic main restricted universe multiverse
deb bionic-updates main restricted universe multiverse
deb bionic-backports main restricted universe multiverse
deb bionic-security main restricted universe multiverse
deb bionic-proposed main restricted universe multiverse
deb-src bionic main restricted universe multiverse
deb-src bionic-updates main restricted universe multiverse
deb-src bionic-backports main restricted universe multiverse
deb-src bionic-security main restricted universe multiverse
deb-src bionic-proposed main restricted universe multiverse
#阿里雲源
deb bionic main restricted universe multiverse
deb bionic-security main restricted universe multiverse
deb bionic-updates main restricted universe multiverse
deb bionic-proposed main restricted universe multiverse
deb bionic-backports main restricted universe multiverse
deb-src bionic main restricted universe multiverse
deb-src bionic-security main restricted universe multiverse
deb-src bionic-updates main restricted universe multiverse
deb-src bionic-proposed main restricted universe multiverse
deb-src bionic-backports main restricted universe multiverse
#清華源
deb bionic main restricted universe multiverse
deb bionic-updates main restricted universe multiverse
deb bionic-backports main restricted universe multiverse
deb bionic-security main restricted universe multiverse
deb bionic-proposed main restricted universe multiverse
deb-src bionic main restricted universe multiverse
deb-src bionic-updates main restricted universe multiverse
deb-src bionic-backports main restricted universe multiverse
deb-src bionic-security main restricted universe multiverse
deb-src bionic-proposed main restricted universe multiverse
sudo apt-get update
sudo apt upgrade
ubuntu apt-get install e: 無法定位軟體包
ubuntu18.04更換國內源
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