我在很多论坛上都看到过这个问题，但看起来并不完全一样。我来解释一下：
我正在尝试从 Ubuntu 软件中心安装“Pinta”软件。我收到以下错误消息：
A continuación se muestran los errores detallados del gestor de paquetes:
apt transaction returned result exit-failed
我搜索了一下，有人说我必须更改 Ubuntu 的软件中心服务器。我来自阿根廷，所以我选择了该服务器。当我将其更改为主服务器并重新加载时，我收到此错误消息：
W:The repository 'http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu xenial Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://archive.ubuntu.com/ubuntu xenial Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://archive.ubuntu.com/ubuntu xenial-updates Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://archive.ubuntu.com/ubuntu xenial-backports Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://archive.ubuntu.com/ubuntu xenial-security Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://dl.google.com/linux/chrome/deb stable Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://repository.spotify.com stable Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:Failed to fetch https://download.sublimetext.com/apt/stable/InRelease Failed to connect to download.sublimetext.com port 443: No route to host,
E:Failed to fetch http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu/dists/xenial/main/source/Sources Unable to connect to ppa.launchpad.net:http:,
E:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-backports/restricted/binary-amd64/Packages Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1560:8001::11). - connect (101: Network is unreachable) [IP: 2001:67c:1560:8001::11 80],
E:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/main/binary-amd64/Packages Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1560:8001::11). - connect (101: Network is unreachable) [IP: 2001:67c:1560:8001::11 80],
E:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-amd64/Packages Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1560:8001::11). - connect (101: Network is unreachable) [IP: 2001:67c:1560:8001::11 80],
E:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-security/main/binary-amd64/Packages Cannot initiate the connection to archive.ubuntu.com:80 (2001:67c:1560:8001::11). - connect (101: Network is unreachable) [IP: 2001:67c:1560:8001::11 80],
E:Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/main/binary-amd64/Packages Cannot initiate the connection to dl.google.com:80 (2800:3f0:4002:806::200e). - connect (101: Network is unreachable) [IP: 2800:3f0:4002:806::200e 80],
E:Failed to fetch http://repository.spotify.com/dists/stable/non-free/binary-amd64/Packages Unable to connect to repository.spotify.com:http: [IP: 54.230.84.32 80],
W:Some index files failed to download. They have been ignored, or old ones used instead.
其他帖子说当我们尝试下载错误版本的软件时就会出现问题，但正如你所见，我总是下载 xenial 版本。
我在这里使用代理，但是我的所有配置都没问题，因为我的合作伙伴有相同的配置，他们没有这个问题。
我的/etc/apt/sources.list文件是这样的：
# deb cdrom:[Ubuntu 16.04.3 LTS _Xenial Xerus_ - Release amd64 (20170801)]/ xenial main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu xenial main restricted
# deb-src http://ar.archive.ubuntu.com/ubuntu/ xenial main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu xenial-updates main restricted
# deb-src http://ar.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
## N.B. 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://archive.ubuntu.com/ubuntu xenial universe
# deb-src http://ar.archive.ubuntu.com/ubuntu/ xenial universe
deb http://archive.ubuntu.com/ubuntu xenial-updates universe
# deb-src http://ar.archive.ubuntu.com/ubuntu/ xenial-updates universe
## N.B. 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://archive.ubuntu.com/ubuntu xenial multiverse
# deb-src http://ar.archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://archive.ubuntu.com/ubuntu xenial-updates multiverse
# deb-src http://ar.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
## N.B. 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://archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse
# deb-src http://ar.archive.ubuntu.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://archive.ubuntu.com/ubuntu xenial-security main restricted
# deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
deb http://archive.ubuntu.com/ubuntu xenial-security universe
# deb-src http://security.ubuntu.com/ubuntu xenial-security universe
deb http://archive.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
我的合作伙伴有相同的文件。