Ubuntu是卡住在更新系統

Question

每次我試圖Ubuntu的終端上運行以下命令來更新錯誤

sudo易於更新

我獲得以下的終端

E: The repository 'http://ppa.launchpad.net/relan/exfat/ubuntu xenial Release' does not have a Release file. 

N: Updating from such a repository can't be done securely, and is therefore disabled by default. 

N: See apt-secure(8) manpage for repository creation and user configuration details. 

錯誤信息

任何人都可以解釋更多關於這個問題。具體是什麼問題！以及是否有解決同一問題的辦法？

Answer 1

爲了擺脫錯誤的，請參閱以下鏈接：

ubuntu-16-04-sudo-apt-get-update-error