我试图virt-manager在我的计算机上安装。我没有注意，继续安装。显然，我的一个存储库当时已关闭 - 因此几乎所有我的核心软件包都被删除或标记为不需要/卸载。我注意到的第一件事是我无法使用互联网，并且我使用的是 XFCE 而不是 Gnome。我登录，解决网络问题，并尝试使用安装 gnome 桌面环境sudo apt-get -s -o Debug::pkgProblemResolver=yes install gnome，以下是输出：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Starting pkgProblemResolver with broken count: 9
Starting 2 pkgProblemResolver with broken count: 9
Investigating (0) gnome:amd64 < none -> 1:3.22+3 @un puN Ib >
Broken gnome:amd64 Depends on libproxy1-plugin-networkmanager:amd64 < none | 0.4.14-2 @un uH >
Considering libproxy1-plugin-networkmanager:amd64 2 as a solution to gnome:amd64 9999
Reinst Failed early because of libproxy1v5:amd64
Broken gnome:amd64 Depends on libreoffice-evolution:amd64 < none | 1:5.2.7-1+deb9u5 @un uH >
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Reinst Failed early because of libreoffice-core:amd64
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Investigating (0) libevolution:amd64 < none -> 3.22.6-1+deb9u1 @un uN Ib >
Broken libevolution:amd64 Depends on libgail-3-0:amd64 < none | 3.22.11-1 @un uH > (>= 3.0.0)
Considering libgail-3-0:amd64 0 as a solution to libevolution:amd64 9
Holding Back libevolution:amd64 rather than change libgail-3-0:amd64
Investigating (0) gnome-control-center:amd64 < none -> 1:3.22.2-3 @un uN Ib >
Broken gnome-control-center:amd64 Depends on libgoa-backend-1.0-1:amd64 < none | 3.22.5-1 @un uH > (>= 3.10.0)
Considering libgoa-backend-1.0-1:amd64 0 as a solution to gnome-control-center:amd64 9
Holding Back gnome-control-center:amd64 rather than change libgoa-backend-1.0-1:amd64
Investigating (0) evolution:amd64 < none -> 3.22.6-1+deb9u1 @un uN Ib >
Broken evolution:amd64 Depends on libevolution:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22.6)
Considering libevolution:amd64 9 as a solution to evolution:amd64 4
Holding Back evolution:amd64 rather than change libevolution:amd64
Investigating (0) p11-kit:amd64 < none -> 0.23.3-2 @un uN Ib >
Broken p11-kit:amd64 Depends on p11-kit-modules:amd64 < none | 0.23.3-2 @un uH > (>= 0.23.3-2)
Considering p11-kit-modules:amd64 0 as a solution to p11-kit:amd64 3
Holding Back p11-kit:amd64 rather than change p11-kit-modules:amd64
Investigating (0) nautilus:amd64 < none -> 3.22.3-1+deb9u1 @rc uN Ib >
Broken nautilus:amd64 Depends on libgail-3-0:amd64 < none | 3.22.11-1 @un uH > (>= 3.0.0)
Considering libgail-3-0:amd64 0 as a solution to nautilus:amd64 3
Holding Back nautilus:amd64 rather than change libgail-3-0:amd64
Investigating (0) evolution-plugins:amd64 < none -> 3.22.6-1+deb9u1 @un uN Ib >
Broken evolution-plugins:amd64 Depends on libevolution:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22.6)
Considering libevolution:amd64 9 as a solution to evolution-plugins:amd64 3
Holding Back evolution-plugins:amd64 rather than change libevolution:amd64
Investigating (0) gnome-sushi:amd64 < none -> 3.21.91-2 @un uN Ib >
Broken gnome-sushi:amd64 Depends on nautilus:amd64 < none | 3.22.3-1+deb9u1 @rc uH > (>= 3.2)
Considering nautilus:amd64 3 as a solution to gnome-sushi:amd64 2
Holding Back gnome-sushi:amd64 rather than change nautilus:amd64
Investigating (0) gnome-shell-extensions:amd64 < none -> 3.22.2-1 @un uN Ib >
Broken gnome-shell-extensions:amd64 Depends on gvfs:amd64 < none | 1.30.4-1 @un uH > (>= 1.16.0)
Considering gvfs:amd64 9 as a solution to gnome-shell-extensions:amd64 0
Holding Back gnome-shell-extensions:amd64 rather than change gvfs:amd64
Investigating (0) gnome-core:amd64 < none -> 1:3.22+3 @un uN Ib >
Broken gnome-core:amd64 Depends on gnome-control-center:amd64 < none | 1:3.22.2-3 @un uH > (>= 1:3.22)
Considering gnome-control-center:amd64 9 as a solution to gnome-core:amd64 0
Holding Back gnome-core:amd64 rather than change gnome-control-center:amd64
Investigating (0) gvfs-fuse:amd64 < none -> 1.30.4-1 @un uN Ib >
Broken gvfs-fuse:amd64 Depends on gvfs:amd64 < none | 1.30.4-1 @un uH > (= 1.30.4-1)
Considering gvfs:amd64 9 as a solution to gvfs-fuse:amd64 0
Holding Back gvfs-fuse:amd64 rather than change gvfs:amd64
Investigating (0) gnome-orca:amd64 < none -> 3.22.2-3 @rc uN Ib >
Broken gnome-orca:amd64 Depends on python3-brlapi:amd64 < none | 5.4-7+deb9u1 @un uH > (>= 0.5.1)
Considering python3-brlapi:amd64 0 as a solution to gnome-orca:amd64 0
Holding Back gnome-orca:amd64 rather than change python3-brlapi:amd64
Investigating (1) gnome:amd64 < none -> 1:3.22+3 @un puN Ib >
Broken gnome:amd64 Depends on gnome-core:amd64 < none | 1:3.22+3 @un uH > (= 1:3.22+3)
Considering gnome-core:amd64 0 as a solution to gnome:amd64 9999
Reinst Failed early because of libgoa-1.0-common:amd64
Reinst Failed because of libgoa-backend-1.0-1:amd64
Reinst Failed because of gnome-control-center:amd64
Broken gnome:amd64 Depends on libproxy1-plugin-networkmanager:amd64 < none | 0.4.14-2 @un uH >
Considering libproxy1-plugin-networkmanager:amd64 2 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on evolution:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22)
Considering evolution:amd64 4 as a solution to gnome:amd64 9999
Reinst Failed early because of libgtk-3-0:amd64
Reinst Failed because of libgail-3-0:amd64
Reinst Failed because of libevolution:amd64
Broken gnome:amd64 Depends on evolution-plugins:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22)
Considering evolution-plugins:amd64 3 as a solution to gnome:amd64 9999
Reinst Failed because of libevolution:amd64
Broken gnome:amd64 Depends on gnome-orca:amd64 < none | 3.22.2-3 @rc uH > (>= 3.22)
Considering gnome-orca:amd64 0 as a solution to gnome:amd64 9999
Reinst Failed early because of python3:amd64
Reinst Failed because of python3-brlapi:amd64
Considering gnome-orca:amd64 0 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on libreoffice-evolution:amd64 < none | 1:5.2.7-1+deb9u5 @un uH >
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Investigating (1) gnome-keyring:amd64 < none -> 3.20.0-3 @un uN Ib >
Broken gnome-keyring:amd64 Depends on p11-kit:amd64 < none | 0.23.3-2 @un uH > (>= 0.16)
Considering p11-kit:amd64 3 as a solution to gnome-keyring:amd64 14
Holding Back gnome-keyring:amd64 rather than change p11-kit:amd64
Investigating (1) seahorse:amd64 < none -> 3.20.0-3.1 @un uN Ib >
Broken seahorse:amd64 Depends on gnome-keyring:amd64 < none | 3.20.0-3 @un uH > (>= 3.4)
Considering gnome-keyring:amd64 14 as a solution to seahorse:amd64 1
Holding Back seahorse:amd64 rather than change gnome-keyring:amd64
Investigating (2) gnome:amd64 < none -> 1:3.22+3 @un puN Ib >
Broken gnome:amd64 Depends on gnome-core:amd64 < none | 1:3.22+3 @un uH > (= 1:3.22+3)
Considering gnome-core:amd64 0 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on libproxy1-plugin-networkmanager:amd64 < none | 0.4.14-2 @un uH >
Considering libproxy1-plugin-networkmanager:amd64 2 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on evolution:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22)
Considering evolution:amd64 4 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on evolution-plugins:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22)
Considering evolution-plugins:amd64 3 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on gnome-orca:amd64 < none | 3.22.2-3 @rc uH > (>= 3.22)
Considering gnome-orca:amd64 0 as a solution to gnome:amd64 9999
Considering gnome-orca:amd64 0 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on seahorse:amd64 < none | 3.20.0-3.1 @un uH > (>= 3.20)
Considering seahorse:amd64 1 as a solution to gnome:amd64 9999
Reinst Failed early because of libp11-kit0:amd64
Reinst Failed because of p11-kit-modules:amd64
Reinst Failed because of p11-kit:amd64
Reinst Failed because of gnome-keyring:amd64
Broken gnome:amd64 Depends on libreoffice-evolution:amd64 < none | 1:5.2.7-1+deb9u5 @un uH >
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Investigating (2) evolution-data-server:amd64 < none -> 3.22.7-1 @un uN Ib >
Broken evolution-data-server:amd64 Depends on gnome-keyring:amd64 < none | 3.20.0-3 @un uH >
Considering gnome-keyring:amd64 14 as a solution to evolution-data-server:amd64 15
Holding Back evolution-data-server:amd64 rather than change gnome-keyring:amd64
Investigating (2) libfolks-eds25:amd64 < none -> 0.11.3-2 @un uN Ib >
Broken libfolks-eds25:amd64 Depends on evolution-data-server:amd64 < none | 3.22.7-1 @un uH > (>= 3.2.0)
Considering evolution-data-server:amd64 15 as a solution to libfolks-eds25:amd64 5
Holding Back libfolks-eds25:amd64 rather than change evolution-data-server:amd64
Investigating (3) gnome:amd64 < none -> 1:3.22+3 @un puN Ib >
Broken gnome:amd64 Depends on gnome-core:amd64 < none | 1:3.22+3 @un uH > (= 1:3.22+3)
Considering gnome-core:amd64 0 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on libproxy1-plugin-networkmanager:amd64 < none | 0.4.14-2 @un uH >
Considering libproxy1-plugin-networkmanager:amd64 2 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on evolution:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22)
Considering evolution:amd64 4 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on evolution-plugins:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22)
Considering evolution-plugins:amd64 3 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on gnome-orca:amd64 < none | 3.22.2-3 @rc uH > (>= 3.22)
Considering gnome-orca:amd64 0 as a solution to gnome:amd64 9999
Considering gnome-orca:amd64 0 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on seahorse:amd64 < none | 3.20.0-3.1 @un uH > (>= 3.20)
Considering seahorse:amd64 1 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on libreoffice-evolution:amd64 < none | 1:5.2.7-1+deb9u5 @un uH >
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Investigating (3) gnome-shell:amd64 < none -> 3.22.3-3 @un uN Ib >
Broken gnome-shell:amd64 Depends on evolution-data-server:amd64 < none | 3.22.7-1 @un uH > (>= 3.17.2)
Considering evolution-data-server:amd64 15 as a solution to gnome-shell:amd64 42
Holding Back gnome-shell:amd64 rather than change evolution-data-server:amd64
Investigating (3) gnome-contacts:amd64 < none -> 3.22.1-1+b2 @un uN Ib >
Broken gnome-contacts:amd64 Depends on libfolks-eds25:amd64 < none | 0.11.3-2 @un uH > (>= 0.7.3)
Considering libfolks-eds25:amd64 5 as a solution to gnome-contacts:amd64 6
Holding Back gnome-contacts:amd64 rather than change libfolks-eds25:amd64
Investigating (3) gdm3:amd64 < none -> 3.22.3-3+deb9u2 @rc uN Ib >
Broken gdm3:amd64 Depends on gnome-shell:amd64 < none | 3.22.3-3 @un uH > (>= 3.19.92)
Considering gnome-shell:amd64 42 as a solution to gdm3:amd64 6
Holding Back gdm3:amd64 rather than change gnome-shell:amd64
Investigating (3) network-manager-gnome:amd64 < none -> 1.4.4-1+deb9u1 @rc uN Ib >
Broken network-manager-gnome:amd64 Depends on policykit-1-gnome:amd64 < none | 0.105-6 @un uH >
Considering policykit-1-gnome:amd64 1 as a solution to network-manager-gnome:amd64 5
Holding Back network-manager-gnome:amd64 rather than change policykit-1-gnome:amd64
Broken network-manager-gnome:amd64 Depends on polkit-1-auth-agent:amd64 < none @un H >
Considering policykit-1-gnome:i386 0 as a solution to network-manager-gnome:amd64 5
Holding Back network-manager-gnome:amd64 rather than change polkit-1-auth-agent:amd64
Or group keep for network-manager-gnome:amd64
Investigating (3) gnome-session:amd64 < none -> 3.22.3-1 @un uN Ib >
Broken gnome-session:amd64 Depends on gnome-shell:amd64 < none | 3.22.3-3 @un uH > (>= 3.19)
Considering gnome-shell:amd64 42 as a solution to gnome-session:amd64 4
Holding Back gnome-session:amd64 rather than change gnome-shell:amd64
Investigating (3) chrome-gnome-shell:amd64 < none -> 8-4 @un uN Ib >
Broken chrome-gnome-shell:amd64 Depends on gnome-shell:amd64 < none | 3.22.3-3 @un uH >
Considering gnome-shell:amd64 42 as a solution to chrome-gnome-shell:amd64 0
Holding Back chrome-gnome-shell:amd64 rather than change gnome-shell:amd64
Investigating (4) gnome:amd64 < none -> 1:3.22+3 @un puN Ib >
Broken gnome:amd64 Depends on gnome-core:amd64 < none | 1:3.22+3 @un uH > (= 1:3.22+3)
Considering gnome-core:amd64 0 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on network-manager-gnome:amd64 < none | 1.4.4-1+deb9u1 @rc uH > (>= 1.4)
Considering network-manager-gnome:amd64 5 as a solution to gnome:amd64 9999
Re-Instated policykit-1-gnome:amd64
Re-Instated network-manager-gnome:amd64
Broken gnome:amd64 Depends on libproxy1-plugin-networkmanager:amd64 < none | 0.4.14-2 @un uH >
Considering libproxy1-plugin-networkmanager:amd64 2 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on evolution:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22)
Considering evolution:amd64 4 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on evolution-plugins:amd64 < none | 3.22.6-1+deb9u1 @un uH > (>= 3.22)
Considering evolution-plugins:amd64 3 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on gnome-orca:amd64 < none | 3.22.2-3 @rc uH > (>= 3.22)
Considering gnome-orca:amd64 0 as a solution to gnome:amd64 9999
Considering gnome-orca:amd64 0 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on seahorse:amd64 < none | 3.20.0-3.1 @un uH > (>= 3.20)
Considering seahorse:amd64 1 as a solution to gnome:amd64 9999
Broken gnome:amd64 Depends on libreoffice-evolution:amd64 < none | 1:5.2.7-1+deb9u5 @un uH >
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
Considering libreoffice-evolution:amd64 1 as a solution to gnome:amd64 9999
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:
gnome : Depends: gnome-core (= 1:3.22+3) but it is not going to be installed
Depends: libproxy1-plugin-networkmanager but it is not going to be installed
Depends: evolution (>= 3.22) but it is not going to be installed
Depends: evolution-plugins (>= 3.22) but it is not going to be installed
Depends: gnome-orca (>= 3.22) but it is not going to be installed
Depends: seahorse (>= 3.20) but it is not going to be installed
Depends: libreoffice-evolution but it is not going to be installed
Recommends: brasero but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
发生了什么？我该如何解决这个问题？
编辑：以下是我的 /etc/apt/sources.list 的内容：
#
# deb cdrom:[Debian GNU/Linux 9.6.0 _Stretch_ - Official amd64 NETINST 20181110-11:34]/ stretch main
# deb cdrom:[Debian GNU/Linux 9.6.0 _Stretch_ - Official amd64 NETINST 20181110-11:34]/ stretch main
deb http://mirrors.kernel.org/debian/ stretch main
deb-src http://mirrors.kernel.org/debian/ stretch main
deb http://security.debian.org/debian-security stretch/updates main
# stretch-updates, previously known as 'volatile'
deb http://mirrors.kernel.org/debian/ stretch-updates main
deb https://packages.sury.org/php/ stretch main
# deb-src https://packages.sury.org/php/ stretch main
# deb-src https://packages.sury.org/php/ stretch main
deb-src http://mirrors.kernel.org/debian/ stretch-updates main
deb [arch=amd64] https://download.docker.com/linux/debian stretch stable
# deb-src [arch=amd64] https://download.docker.com/linux/debian stretch stable
deb https://matrix.org/packages/debian/ stretch main
# deb-src https://matrix.org/packages/debian/ stretch main
我还删除了另一个存储库，因为它已关闭，如果我没有记错的话，它是deb ftp.de.debian.org sid main.但是，由于以下错误消息，我无法重新添加此存储库：
E: The method 'ftp' is unsupported and disabled by default. Consider switching to http(s). Set Dir::Bin::Methods::ftp to "ftp" to enable it again.
E: Failed to fetch ftp://ftp.de.debian.org/dists/sid/InRelease
E: Some index files failed to download. They have been ignored, or old ones used instead.
另外，apt-get clean、apt-get install -f、apt-get update都apt-get upgrade什么也没做。也没有apt-get dist-upgrade。