在console中輸入sudo cp /etc/apt/sources.list /etc/apt/sources.list.pak進行檔案備份
在console中輸入sudo vim /etc/apt/sources.list進行檔案修改
替換檔案內容為以下內容：
# 預設注釋了原始碼倉庫，如有需要可自行取消注釋
deb xenial main restricted universe multiverse
# deb-src xenial main main restricted universe multiverse
deb xenial-updates main restricted universe multiverse
# deb-src xenial-updates main restricted universe multiverse
deb xenial-backports main restricted universe multiverse
# deb-src xenial-backports main restricted universe multiverse
deb xenial-security main restricted universe multiverse
# deb-src xenial-security main restricted universe multiverse
# 預發布軟體源，不建議啟用
# deb xenial-proposed main restricted universe multiverse
# deb-src xenial-proposed main restricted universe multiverse
**arm ubuntu開發板的apt的庫和普通ubuntu的庫是不一樣的，arm的是ubuntu-ports庫。
所以只要將sources.list檔案中的ubuntu 改為ubuntu-port即可 **，例如：
# 預設注釋了原始碼倉庫，如有需要可自行取消注釋
deb xenial main restricted universe multiverse
# deb-src xenial main main restricted universe multiverse
deb xenial-updates main restricted universe multiverse
# deb-src xenial-updates main restricted universe multiverse
deb xenial-backports main restricted universe multiverse
# deb-src xenial-backports main restricted universe multiverse
deb xenial-security main restricted universe multiverse
# deb-src xenial-security main restricted universe multiverse
# 預發布軟體源，不建議啟用
# deb xenial-proposed main restricted universe multiverse
# deb-src xenial-proposed main restricted universe multiverse
deb bionic main restricted universe multiverse
deb-src bionic main restricted universe multiverse
deb bionic-security main restricted universe multiverse
deb-src bionic-security 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-proposed main restricted universe multiverse
deb-src bionic-proposed main restricted universe multiverse
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