Ubuntu的E：無法抓取

Question

我通過運行在Ubuntu 16.04 LTE的更新：

sudo apt-get update && sudo apt-get upgrade && sudo apt-get autoremove && sudo apt-get autoclean && sudo apt-get dist-upgrade 

我的問題是：

Lecture des listes de paquets... Fait 
W: The repository 'http://ppa.launchpad.net/freyja-dev/unity-tweak-tool-daily/ubuntu xenial Release' does not have a Release file. 
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. 
N: See apt-secure(8) manpage for repository creation and user configuration details. 
W: The repository 'http://ppa.launchpad.net/tualatrix/next/ubuntu xenial Release' does not have a Release file. 
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. 
N: See apt-secure(8) manpage for repository creation and user configuration details. 
E: Failed to fetch http://ppa.launchpad.net/freyja-dev/unity-tweak-tool-daily/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found 
E: Failed to fetch http://ppa.launchpad.net/tualatrix/next/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found 
E: Le téléchargement de quelques fichiers d'index a échoué, ils ont été ignorés, ou les anciens ont été utilisés à la place. 

你能幫助我嗎？

Answer 1

嘗試增加xenial到回購

回聲 '的deb http://download.fpcomplete.com/ubuntu xenial主' |須藤發球/etc/apt/sources.list.d/fpco.list