1、開啟軟體源配置檔案/etc/apt/sources.list
sudo gedit /etc/apt/sources.list2、將檔案裡面的內容替換
deb vivid main restricted universe multiverse
deb vivid-security main restricted universe multiverse
deb vivid-updates main restricted universe multiverse
deb vivid-proposed main restricted universe multiverse
deb vivid-backports main restricted universe multiverse
deb-src vivid main restricted universe multiverse
deb-src vivid-security main restricted universe multiverse
deb-src vivid-updates main restricted universe multiverse
deb-src vivid-proposed main restricted universe multiverse
deb-src vivid-backports main restricted universe multiverse
deb precise main universe restricted multiverse
deb-src precise main universe restricted multiverse
deb precise-security universe main multiverse restricted
deb-src precise-security universe main multiverse restricted
deb precise-updates universe main multiverse restricted
deb precise-proposed universe main multiverse restricted
deb-src precise-proposed universe main multiverse restricted
deb precise-backports universe main multiverse restricted
deb-src precise-backports universe main multiverse restricted
deb-src precise-updates universe main multiverse restricted
3、執行更新
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