apt获取更新缺失发布文件

执行apt-get-update后，我总是收到以下错误消息：

Reading package lists... Done W: The repository 'http://ppa.launchpad.net/ubuntu-audio-dev/ppa/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. N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'http://dl.google.com/linux/chrome/deb stable InRelease' doesn't support architecture 'i386' E: Failed to fetch http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu/dists/xenial/main/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. 

我读了一篇post说应该改变/etc/apt/sources.list（见下文）的内容。 哪些线路需要评论？

 # deb cdrom:[Ubuntu 11.10 _Oneiric Ocelot_ - Release i386 (20111012)]/ oneiric main restricted # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://gb.archive.ubuntu.com/ubuntu/ xenial main restricted deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial main restricted ## Major bug fix updates produced after the final release of the ## distribution. deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates main restricted deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-updates main restricted ## NB software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team. Also, please note that software in universe WILL NOT receive any ## review or updates from the Ubuntu security team. deb http://gb.archive.ubuntu.com/ubuntu/ xenial universe deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial universe deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates universe deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-updates universe ## NB software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu ## security team. deb http://gb.archive.ubuntu.com/ubuntu/ xenial multiverse deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial multiverse deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates multiverse deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-updates multiverse ## NB software from this repository may not have been tested as ## extensively as that contained in the main release, although it includes ## newer versions of some applications which may provide useful features. ## Also, please note that software in backports WILL NOT receive any review ## or updates from the Ubuntu security team. deb http://gb.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu xenial-security main restricted deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted deb http://security.ubuntu.com/ubuntu xenial-security universe deb-src http://security.ubuntu.com/ubuntu xenial-security universe deb http://security.ubuntu.com/ubuntu xenial-security multiverse deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse ``` 

编辑：sources.list.d的内容：

 brightbox-ruby-ng-trusty.list brightbox-ruby-ng-trusty.list.save danielrichter2007-grub-customizer-precise.list danielrichter2007-grub-customizer-precise.list.distUpgrade danielrichter2007-grub-customizer-precise.list.save google-chrome.list google-chrome.list.distUpgrade google-chrome.list.save heroku.list heyarje-libav-11-trusty.list inkscape_dev-stable-trusty.list inkscape_dev-stable-trusty.list.save maarten-baert-simplescreenrecorder-trusty.list maarten-baert-simplescreenrecorder-trusty.list.save megasync.list megasync.list.distUpgrade megasync.list.save ondrej-php-trusty.list ondrej-php-trusty.list.save oneiric-partner.list oneiric-partner.list.distUpgrade oneiric-partner.list.save spring-ppa-trusty.list spring-ppa-trusty.list.save thomas_tsai-ubuntu-tuxboot-trusty.list thomas_tsai-ubuntu-tuxboot-trusty.list.save webupd8team-java-trusty.list webupd8team-java-trusty.list.save 

Answer 1

我已经通过添加它们测试了ppa，它也显示了您发生的相同错误：

 W: The repository 'http://ppa.launchpad.net/ubuntu-audio-dev/ppa/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/ubuntu-audio-dev/ppa/ubuntu/dists/xenial/main/binary-i386/Packages 404 Not Found 

如果你去他们的启动板ppa页面 ，你会看到ppa不再可用13.10（Saucy Salamander），这会导致404 Not Found错误：

为了摆脱错误，只需删除ppa：

 sudo add-apt-repository --remove ppa:ubuntu-audio-dev/ppa sudo apt-get update sudo apt-key del 72B194E5 

更新

对于There is no public key available错误，在终端上运行以下：

 sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1397BC53640DB551 

对于in Release file Google Chrome错误，请执行以下步骤：

1. 打开一个新的终端窗口并运行以下命令：

    sudo gedit /etc/apt/sources.list.d/google-chrome.list 

2. 在打开的文本文件中编辑文件，以便该行显示：

    deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main 

3. 点击保存。 关闭Gedit窗口。

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