在編輯之前做個備份
sudo cp /etc/apt/source.list /etc/apt/sources.list_backup
編輯源位址
sudo gedit /etc/apt/sources.list
更新命令
sudo apt-get update
sudo apt-get dist-upgrade
教育網可用更新源：
編輯軟體源列表，新增如下語句：
deb jaunty main multiverse restricted universe
deb jaunty-backports main multiverse restricted universe
deb jaunty-proposed main multiverse restricted universe
deb jaunty-security main multiverse restricted universe
deb jaunty-updates main multiverse restricted universe
以上為byr源，如果源有問題（比如提示failed to open file），請更換下列教育網源（挑選乙個就可以了）：
#中科大
deb jaunty main restricted universe multiverse
deb jaunty-backports restricted universe multiverse
deb jaunty-proposed main restricted universe multiverse
deb jaunty-security main restricted universe multiverse
deb jaunty-updates main restricted universe multiverse
#上海交大
deb jaunty main multiverse restricted universe
deb jaunty-backports main multiverse restricted universe
deb jaunty-proposed main multiverse restricted universe
deb jaunty-security main multiverse restricted universe
deb jaunty-updates main multiverse restricted universe
deb jaunty bleeding main multiverse restricted universe
# 台灣交大
deb jaunty main multiverse restricted universe
deb jaunty-backports main multiverse restricted universe
deb jaunty-proposed main multiverse restricted universe
deb jaunty-security main multiverse restricted universe
deb jaunty-updates main multiverse restricted universe
外網源：
#163
deb intrepid main restricted universe multiverse
deb intrepid-security main restricted universe multiverse
deb intrepid-updates main restricted universe multiverse
deb intrepid-proposed main restricted universe multiverse
deb intrepid-backports main restricted universe multiverse
#sohu
deb intrepid main restricted universe multiverse
deb intrepid-security main restricted universe multiverse
deb intrepid-updates main restricted universe multiverse
deb intrepid-proposed main restricted universe multiverse
deb intrepid-backports main restricted universe multiverse
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