我有 ubuntu 16.04 我安装了 max os 主题
此链接http://www.noobslab.com/2016/04/macbuntu-1604-transformation-pack-for.html
问题是当我输入 apt-get update 时，我收到了这条消息
所以我删除了链接中的主题文件
我该怎么做才能删除此消息？它太慢了，而且我也无法进行软件更新和源代码更新。
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这是 apt-get update 结果的一部分
root@found:~# apt-get update 点击：
1 http://ftp.neowiz.com/ubuntu xenial InRelease
Hit:2 http://ftp.neowiz.com/ubuntu xenial-updates InRelease
Hit:3 http://ppa.launchpad.net/noobslab/macbuntu/ubuntu xenial InRelease
Hit:4 http://ftp.neowiz.com/ubuntu xenial-backports InRelease
Ign:5 http://ppa.launchpad.net/upubuntu-com/gtk3/ubuntu xenial InRelease
Ign:6 http://ppa.launchpad.net/upubuntu-com/themes/ubuntu xenial InRelease
Hit:7 http://ftp.neowiz.com/ubuntu xenial-security InRelease
Ign:8 http://ppa.launchpad.net/vidplace7/bluez5/ubuntu xenial
Ign:29 http://ppa.launchpad.net/vidplace7/bluez5/ubuntu xenial/main Translation-en_US
Ign:30 http://ppa.launchpad.net/vidplace7/bluez5/ubuntu xenial/main
Ign:32 http://ppa.launchpad.net/vidplace7/bluez5/ubuntu xenial/main DEP-11 64x64 Icons
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/upubuntu-com/gtk3/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/upubuntu-com/themes/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/vidplace7/bluez5/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/upubuntu-com/gtk3/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Failed to fetch http://ppa.launchpad.net/upubuntu-com/themes/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Failed to fetch http://ppa.launchpad.net/vidplace7/bluez5/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
答案1
正如你提到的，你已经遵循了其中的说明关联。因此您需要恢复此步骤：
sudo add-apt-repository ppa:noobslab/macbuntu
赶紧跑：
sudo add-apt-repository --remove ppa:noobslab/macbuntu
将其替换ppa:noobslab/macbuntu为您之前添加的内容。
此外，我注意到导致此问题的原因不是 noobslab ppa。错误（这些消息以埃：）表示问题出在 upubuntu-com 和 vidplace ppa 上，你可能也想删除它们
sudo add-apt-repository --remove ppa:upubuntu-com/gtk3
sudo add-apt-repository --remove ppa:upubuntu-com/themes
sudo add-apt-repository --remove ppa:vidplace7/bluz5
完成后，再试sudo apt-get update一次。