apt-get install mumble-server我正在尝试在 Rackspace Cloud 上的 Ubuntu 11.10 Server Edition 上安装 mumble-server 包。
问题是否是它找不到应该找到的依赖项，因为它们存在于 launchpad.net 上？
依赖项消息：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
mumble-server : Depends: libavahi-compat-libdnssd1 (>= 0.6.16) but it is not installable
Depends: libprotobuf7 but it is not installable
Depends: libqt4-dbus (>= 4:4.5.3) but it is not installable
Depends: libqt4-network (>= 4:4.5.3) but it is not installable
Depends: libqt4-sql (>= 4:4.5.3) but it is not installable
Depends: libqt4-xml (>= 4:4.5.3) but it is not installable
Depends: libqtcore4 (>= 4:4.7.0~beta1) but it is not installable
Depends: libqt4-sql-sqlite but it is not installable
E: Unable to correct problems, you have held broken packages.
有人知道我是否可能缺少资源吗？我在谷歌上搜索过，没有发现其他人遇到这种情况，也没有其他人无法安装上述软件包。感谢您的时间！
来源列表：
deb http://mirror.rackspace.com/ubuntu/ oneiric restricted
deb-src http://mirror.rackspace.com/ubuntu/ oneiric restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://mirror.rackspace.com/ubuntu/ oneiric-updates restricted
deb-src http://mirror.rackspace.com/ubuntu/ oneiric-updates 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://mirror.rackspace.com/ubuntu/ oneiric universe
deb-src http://mirror.rackspace.com/ubuntu/ oneiric universe
deb http://mirror.rackspace.com/ubuntu/ oneiric-updates universe
deb-src http://mirror.rackspace.com/ubuntu/ oneiric-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://mirror.rackspace.com/ubuntu/ oneiric multiverse
deb-src http://mirror.rackspace.com/ubuntu/ oneiric multiverse
deb http://mirror.rackspace.com/ubuntu/ oneiric-updates multiverse
deb-src http://mirror.rackspace.com/ubuntu/ oneiric-updates multiverse
## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the 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://us.archive.ubuntu.com/ubuntu/ oneiric-backports restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ oneiric-backports 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 oneiric partner
# deb-src http://archive.canonical.com/ubuntu oneiric partner
deb http://security.ubuntu.com/ubuntu oneiric-security restricted
deb-src http://security.ubuntu.com/ubuntu oneiric-security restricted
deb http://security.ubuntu.com/ubuntu oneiric-security universe
deb-src http://security.ubuntu.com/ubuntu oneiric-security universe
deb http://security.ubuntu.com/ubuntu oneiric-security multiverse
deb-src http://security.ubuntu.com/ubuntu oneiric-security multiverse
# Cool Kid Webmin/Usermin Here Brah
deb http://download.webmin.com/download/repository sarge contrib
deb http://webmin.mirror.somersettechsolutions.co.uk/repository sarge contrib
答案1
通过将 Rackspace 镜像替换为以下位置的默认 Ubuntu URL 来修复： http://repogen.simplylinux.ch/
答案2
我通过添加restricted universe multiverse来 解决这个问题/etc/apt/sources.list，就像这样
deb http://us.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse