我无法安装 gnome-control-center。由于某些原因，我之前已将其删除。每当我尝试安装它时，都会出现以下信息：
$ sudo apt install gnome-control-center
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package gnome-control-center is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
gnome-control-center-data
E: Package 'gnome-control-center' has no installation candidate
一切都很顺利，直到我安装了 samba 服务器，但失败了，我不知道为什么，但出现了这个消息dpkg is locked。我卸载了它，然后这样做了sudo apt autoremove。之后我尝试重新安装它，但出现了同样的错误，但错误被samba代替了gnome-control-center。因此，我手动删除了 samba 的所有文件，如 所示whereis samba。之后，麻烦就开始了。
更新：
我正在使用 Ubuntu 18.04 LTS。
更新 2：'cat /etc/apt/sources.list 的输出
# deb cdrom:[Ubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725)]/ bionic main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://pk.archive.ubuntu.com/ubuntu/ bionic restricted
# deb-src http://pk.archive.ubuntu.com/ubuntu/ bionic main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://pk.archive.ubuntu.com/ubuntu/ bionic-updates restricted
# deb-src http://pk.archive.ubuntu.com/ubuntu/ bionic-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://pk.archive.ubuntu.com/ubuntu/ bionic universe
# deb-src http://pk.archive.ubuntu.com/ubuntu/ bionic universe
deb http://pk.archive.ubuntu.com/ubuntu/ bionic-updates universe
# deb-src http://pk.archive.ubuntu.com/ubuntu/ bionic-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://pk.archive.ubuntu.com/ubuntu/ bionic multiverse
# deb-src http://pk.archive.ubuntu.com/ubuntu/ bionic multiverse
deb http://pk.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
# deb-src http://pk.archive.ubuntu.com/ubuntu/ bionic-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://pk.archive.ubuntu.com/ubuntu/ bionic-backports restricted universe multiverse
# deb-src http://pk.archive.ubuntu.com/ubuntu/ bionic-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 bionic partner
# deb-src http://archive.canonical.com/ubuntu bionic partner
deb http://security.ubuntu.com/ubuntu bionic-security restricted
# deb-src http://security.ubuntu.com/ubuntu bionic-security main restricted
deb http://security.ubuntu.com/ubuntu bionic-security universe
# deb-src http://security.ubuntu.com/ubuntu bionic-security universe
deb http://security.ubuntu.com/ubuntu bionic-security multiverse
# deb-src http://security.ubuntu.com/ubuntu bionic-security multiverse
答案1
gnome 控制中心包存在于主要的Ubuntu 的存储库。要启用它，您可以运行以下三个命令之一：
add-apt-repository和main：sudo add-apt-repository mainadd-apt-repository附有档案完整地址：sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main"-
echo "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main" | sudo tee -a /etc/apt/sources.list
一旦启用，请尝试再次安装 gnome-control-center。