APT握断安装

Question

我正在使用Debian9.5，最近卸载了一个软件包(mariadb)，现在，当我尝试安装一个新的软件包时，我一直得到这样的信息：

E: Unable to correct problems, you have held broken packages.

我尝试过这些命令，但没有结果：

sudo dpkg --configure -a
sudo apt-get install -f
apt-get install --fix-broken

我还运行了这个命令来显示损坏的包，但是它没有显示任何内容：

apt-mark showhold

即使当我尝试运行sudo apt-get upgrade时，我也会得到以下结果：

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

然后，我安装了智能包管理器(不知道如何安装)，并尝试用sudo aptitude install mysql-server安装新包，它展示了一些东西：

The following packages have unmet dependencies:
 libdbi-perl : Depends: perlapi-5.24.1 which is a virtual package, provided by:
                        - perl-base (5.24.1-3+deb9u4), but 5.26.2-7 is installed

 libfcgi-perl : Depends: perlapi-5.24.1 which is a virtual package, provided by:
                         - perl-base (5.24.1-3+deb9u4), but 5.26.2-7 is installed

 libterm-readkey-perl : Depends: perlapi-5.24.1 which is a virtual package, provided by:
                                 - perl-base (5.24.1-3+deb9u4), but 5.26.2-7 is installed

 libdbd-mysql-perl : Depends: perlapi-5.24.1 which is a virtual package, provided by:
                              - perl-base (5.24.1-3+deb9u4), but 5.26.2-7 is installed

The following actions will resolve these dependencies:

      Keep the following packages at their current version:         
1)      default-mysql-server [Not Installed]                        
2)      libcgi-fast-perl [Not Installed]                            
3)      libdbd-mysql-perl [Not Installed]                           
4)      libdbi-perl [Not Installed]                                 
5)      libfcgi-perl [Not Installed]                                
6)      libterm-readkey-perl [Not Installed]                        
7)      mariadb-server-10.1 [Not Installed]                         
8)      mysql-server [Not Installed]                                

      Leave the following dependencies unresolved:                  
9)      libcgi-pm-perl recommends libcgi-fast-perl (>= 1:2.01)      
10)     mariadb-client-10.1 recommends libdbd-mysql-perl (>= 1.2202)
11)     mariadb-client-10.1 recommends libdbi-perl                  
12)     mariadb-client-10.1 recommends libterm-readkey-perl     

这是apt policy pearl-base的输出：

 perl-base:    
    Installed: 5.26.2-7    
    Candidate: 5.26.2-7    
    Version table:    
 *** 5.26.2-7 500   
    500 http://ftp.us.debian.org/debian testing/main amd64 Packages    
    100 /var/lib/dpkg/status    
 5.24.1-3+deb9u4 500    
    500 http://httpredir.debian.org/debian stretch/main amd64 Packages    
    500 http://ftp.de.debian.org/debian stretch/main amd64 Packages     
    500 http://deb.debian.org/debian stretch/main amd64 Packages        

Answer 1

您的存储库中有优先级为500的测试，与稳定的存储库相同；这实际上意味着您正在运行Debian测试，而不是Debian 9.5。(感谢您帮助测试Debian的下一个版本！)

mysql-server目前在测试中不可用，因此apt install mysql-server (或其中的变体)试图在Debian稳定器中安装该版本；但这需要Perl的Debian，而不是Debian测试版本，因此安装不能进行。

要解决这个问题，我推荐恢复到Debian稳定。如果您想继续测试，您必须等待MySQL迁移到那里，或者切换到混合测试/不稳定设置。