Debian 升级到 10 版本后要求我自动删除几个软件包。所以我说“是”，现在一切都很糟糕。
这是我尝试安装 mysql-server 时看到的内容：
apt-get install mysql-server
Reading package lists... Done
Building dependency tree
Reading state information... 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:
mysql-server : Depends: default-mysql-server but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
这是我尝试安装 default-mysql-server 的时候：
apt-get install default-mysql-server
Reading package lists... Done
Building dependency tree
Reading state information... 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:
default-mysql-server : Depends: mariadb-server-10.1 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
这是尝试安装 mariadb-server-10.1 的时间
apt-get install mariadb-server-10.1
Reading package lists... Done
Building dependency tree
Reading state information... 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:
mariadb-server-10.1 : Depends: libdbi-perl but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
这是我尝试安装 libdbi-perl
apt-get install libdbi-perl
Reading package lists... Done
Building dependency tree
Reading state information... 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:
libdbi-perl : Depends: perlapi-5.24.1
E: Unable to correct problems, you have held broken packages.
这是我尝试安装 perlapi-5.24.1
apt-get install perlapi-5.24.1
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package perlapi-5.24.1 is a virtual package provided by:
perl-base 5.24.1-3+deb9u5 [Not candidate version]
E: Package 'perlapi-5.24.1' has no installation candidate