我刚刚开始注意到这一点。我目前正在使用 Wily Werewolf，并且运行良好。我做了一些测试以确保我确实在使用 Wily，例如检查 Unity 版本 (7.3.2) 和 gnome-terminal 版本 (3.16.2)。
但奇怪的是，当我点击显示桌面图标时，顶部显示DreamStudio Desktop。我以前从未安装过 DreamStudio！最重要的是，当我进入终端并输入 时lsb_release -a，它显示DreamStudio 14.04.2 LTS为发行版，并precise显示为发行代号！
请帮帮我，这种事以前从未发生过。
提前致谢
编辑 1：输出cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 13.10 _Saucy Salamander_ - Release amd64 (20131016.1)]/ saucy 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/ wily main restricted multiverse
deb-src http://archive.ubuntu.com/ubuntu/ wily main restricted multiverse
## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu/ wily-updates main restricted multiverse
deb-src http://archive.ubuntu.com/ubuntu/ wily-updates main restricted multiverse
## 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/ wily universe
deb-src http://archive.ubuntu.com/ubuntu/ wily universe
deb http://archive.ubuntu.com/ubuntu/ wily-updates universe
deb-src http://archive.ubuntu.com/ubuntu/ wily-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.
## 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/ wily-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ wily-backports main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ wily-security main restricted multiverse
deb-src http://archive.ubuntu.com/ubuntu/ wily-security main restricted multiverse
deb http://archive.ubuntu.com/ubuntu/ wily-security universe
deb-src http://archive.ubuntu.com/ubuntu/ wily-security universe
## 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 saucy partner
# deb-src http://archive.canonical.com/ubuntu saucy partner
编辑 2：输出grep -r dreamstudio /etc/apt
可能是导致此错误的原因，但只是开始显示这些错误，并且我尝试过尝试安装 DreamStudio，但从未到达写入更改的阶段。
/etc/apt/sources.list.d/dreamstudio-ubuntu-dreamstudio-stable-wily.list.distUpgrade:deb http://ppa.launchpad.net/dreamstudio/dreamstudio-stable/ubuntu trusty main
/etc/apt/sources.list.d/dreamstudio-ubuntu-dreamstudio-stable-wily.list.distUpgrade:# deb-src http://ppa.launchpad.net/dreamstudio/dreamstudio-stable/ubuntu trusty main
/etc/apt/sources.list.d/dreamstudio-ubuntu-dreamstudio-stable-wily.list:deb http://ppa.launchpad.net/dreamstudio/dreamstudio-stable/ubuntu trusty main
/etc/apt/sources.list.d/dreamstudio-ubuntu-dreamstudio-stable-wily.list:# deb-src http://ppa.launchpad.net/dreamstudio/dreamstudio-stable/ubuntu trusty main
/etc/apt/sources.list.d/dreamstudio-ubuntu-dreamstudio-stable-wily.list.save:deb http://ppa.launchpad.net/dreamstudio/dreamstudio-stable/ubuntu trusty main
/etc/apt/sources.list.d/dreamstudio-ubuntu-dreamstudio-stable-wily.list.save:# deb-src http://ppa.launchpad.net/dreamstudio/dreamstudio-stable/ubuntu trusty main
编辑 3：输出apt-cache policy base-files
base-files:
Installed: 7.2ubuntu11
Candidate: 7.2ubuntu11
Version table:
*** 7.2ubuntu11 0
500 http://archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
100 /var/lib/dpkg/status
编辑4：输出apt-cache policy unity
unity:
Installed: 7.3.2+15.10.20151016-0ubuntu1
Candidate: 7.3.2+15.10.20151016-0ubuntu1
Version table:
*** 7.3.2+15.10.20151016-0ubuntu1 0
500 http://archive.ubuntu.com/ubuntu/ xenial/main amd64 Packages
100 /var/lib/dpkg/status
编辑 5：输出dpkg -l 'language-pack-gnome*'
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==================================-======================-======================-=========================================================================
ii language-pack-gnome-en 1:15.10+20151016 all GNOME translation updates for language English
ii language-pack-gnome-en-base 1:15.10+20151016 all GNOME translations for language English
un language-pack-gnome-zh-base (no description available)
un language-pack-gnome-zh-hant (no description available)
rc language-pack-gnome-zh-hant-base 1:14.04+20140707 all GNOME translations for language Traditional Chinese
编辑 6：输出apt-cache policy language-pack-gnome-en language-pack-gnome-en-base
language-pack-gnome-en:
Installed: 1:15.10+20151016
Candidate: 1:15.10+20151016
Version table:
*** 1:15.10+20151016 0
500 http://archive.ubuntu.com/ubuntu/ xenial/main amd64 Packages
100 /var/lib/dpkg/status
language-pack-gnome-en-base:
Installed: 1:15.10+20151016
Candidate: 1:15.10+20151016
Version table:
*** 1:15.10+20151016 0
500 http://archive.ubuntu.com/ubuntu/ xenial/main amd64 Packages
100 /var/lib/dpkg/status