几乎我尝试的任何涉及的命令apt-get都会给我一个错误，告诉我我应该运行apt-get -f install，但这给了我这个错误：
root@vps148794:~# apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... failed.
The following packages have unmet dependencies:
cpp-4.7 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
g++-4.7 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
gcc-4.7 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
libgcc1 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
libgomp1 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
libitm1 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
libquadmath0 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
libstdc++6 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
libstdc++6-4.7-dev : Depends: gcc-4.7-base (= 4.7.2-5) but it is not installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies
似乎gcc-4.7缺失是个问题，但如果我尝试apt-get install gcc-4.7
root@vps148794:~# apt-get install gcc-4.7
Reading package lists... Done
Building dependency tree
Reading state information... Done
gcc-4.7 is already the newest version.
gcc-4.7 set to manually installed.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
cpp-4.7 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
g++-4.7 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
gcc-4.7 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
libgcc1 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
libgomp1 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
libitm1 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
libquadmath0 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
libstdc++6 : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
libstdc++6-4.7-dev : Depends: gcc-4.7-base (= 4.7.2-5) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
为什么会发生这种情况？如何恢复 apt-get 以便可以安装东西？我完全无法安装，因为无论我尝试安装什么都会出现此错误。也许这能有所帮助？
root@vps148794:~# apt-cache policy gcc-4.7 g++-4.7
gcc-4.7:
Installed: 4.7.2-5
Candidate: 4.7.2-5
Version table:
*** 4.7.2-5 0
500 http://ftp.debian.org/debian/ wheezy/main amd64 Packages
500 http://ftp.fr.debian.org/debian/ wheezy/main amd64 Packages
100 /var/lib/dpkg/status
g++-4.7:
Installed: 4.7.2-5
Candidate: 4.7.2-5
Version table:
*** 4.7.2-5 0
500 http://ftp.debian.org/debian/ wheezy/main amd64 Packages
500 http://ftp.fr.debian.org/debian/ wheezy/main amd64 Packages
100 /var/lib/dpkg/status
root@vps148794:~# apt-cache policy gcc-4.7-base
gcc-4.7-base:
Installed: (none)
Candidate: 4.7.2-5
Version table:
4.7.2-5 0
500 http://ftp.debian.org/debian/ wheezy/main amd64 Packages
500 http://ftp.fr.debian.org/debian/ wheezy/main amd64 Packages
来源列表：
deb http://ftp.debian.org/debian/ wheezy main
deb http://security.debian.org/ wheezy/updates main
#deb http://apt.izzysoft.de/ubuntu generic universe
deb http://ftp.fr.debian.org/debian/ wheezy main contrib non-free
deb-src http://ftp.fr.debian.org/debian/ wheezy main contrib non-free
deb http://cdn.debian.net/debian wheezy-backports main
答案1
你真的应该好好想想你在这里做什么。Debian Wheezy 现在完全不受支持，而且在某个时候（我不记得是否已经宣布过）它将从（主）镜像中删除。
答案在于gcc-4.7已安装和gcc-4.7-base编辑显示未安装之间的区别。安装它应该会有所帮助。（我真的无法解释你为什么会陷入那种境地。）
还有一件事：我不知道 izzysoft.de repo 里有什么，但它似乎是为 ubuntu 制作的，混合这样的存储库可能会非常危险。