Apt-get update错误启动板
每当我apt-get update我都会在最后收到此错误消息：
W: The repository 'http://ppa.launchpad.net/mc3man/trusty-media/ubuntu/dists trusty 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/mc3man/trusty-media/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/mc3man/trusty-media/ubuntu/dists/dists/trusty/main/binary-amd64/Packages 404 Not Found E: Failed to fetch http://ppa.launchpad.net/mc3man/trusty-media/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.
这是我的sources文件的样子：
# deb http://mirrors.linode.com/ubuntu/ xenial main restricted # deb http://mirrors.linode.com/ubuntu/ xenial-updates main restricted # deb http://security.ubuntu.com/ubuntu xenial-security main restricted # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://mirrors.linode.com/ubuntu/ xenial main restricted # deb-src http://mirrors.linode.com/ubuntu/ xenial main restricted ## Major bug fix updates produced after the final release of the ## distribution. deb http://mirrors.linode.com/ubuntu/ xenial-updates main restricted # deb-src http://mirrors.linode.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://mirrors.linode.com/ubuntu/ xenial universe # deb-src http://mirrors.linode.com/ubuntu/ xenial universe deb http://mirrors.linode.com/ubuntu/ xenial-updates universe # deb-src http://mirrors.linode.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://mirrors.linode.com/ubuntu/ xenial multiverse # deb-src http://mirrors.linode.com/ubuntu/ xenial multiverse deb http://mirrors.linode.com/ubuntu/ xenial-updates multiverse # deb-src http://mirrors.linode.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://mirrors.linode.com/ubuntu/ xenial-backports main restricted universe multiverse # deb-src http://mirrors.linode.com/ubuntu/ xenial-backports main restricted universe multiverse ## Uncomment the following two lines to add software from Canonical's ## 'partner' repository. ## This software is not part of Ubuntu, but is offered by Canonical and the ## respective vendors as a service to Ubuntu users. # deb http://archive.canonical.com/ubuntu xenial partner # deb-src http://archive.canonical.com/ubuntu xenial partner 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 deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable # deb-src [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable deb http://ppa.launchpad.net/mc3man/trusty-media/ubuntu/dists trusty main # deb-src http://ppa.launchpad.net/chris-lea/libsodium/ubuntu xenial main
我已经在Web浏览器中打开了PPA链接 ，并且没有错误到达它。
您的分发版本是16.04。
但正如您所看到的， PPA没有Xenial的任何软件包。
它只有可信赖（14.04）版本的Ubuntu的软件包。
所以请尝试使用此命令删除此PPA：
sudo add-apt-repository -r ppa:mc3man/trusty-media sudo apt update
你的问题应该解决。