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mysql-common无法卸载

tag-icon • tag-icon apt package-management dpkg uninstall mysql
mysql-common无法卸载

我正在尝试完全卸载 mysql 以便稍后重新安装它，在卸载所有与 mysql 相关的软件包后，mysql-common 似乎仍然处于损坏状态。

$ sudo dpkg -l | grep mysql
pc  mysql-common                                  5.6.28-0ubuntu0.15.10.1                      all          MySQL database common files, e.g. /etc/mysql/my.cnf

但运行 apt-get remove

$ sudo apt-get remove mysql-common
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'mysql-common' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 36 not upgraded.

或者使用 --purge

$ sudo apt-get remove --purge mysql-common
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  mysql-common*
0 upgraded, 0 newly installed, 1 to remove and 36 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 199090 files and directories currently installed.)
Removing mysql-common (5.6.28-0ubuntu0.15.10.1) ...
Purging configuration files for mysql-common (5.6.28-0ubuntu0.15.10.1) ...
update-alternatives: error: no alternatives for my.cnf
dpkg: error processing package mysql-common (--purge):
 subprocess installed post-removal script returned error exit status 2
Errors were encountered while processing:
 mysql-common
E: Sub-process /usr/bin/dpkg returned an error code (1)

此外，我删除了所有与 mysql 相关的目录和文件。

我怎样才能摆脱这个挥之不去的破损包裹？

答案1

如果某些依赖项消失，或者由于某种原因删除了某些配置文件，则某些软件包无法卸载。最终您将得到一个未完全安装或未完全卸载的软件包。

在这种情况下，解决方案是卸载sudo apt-get install软件包。如有必要，请执行sudo apt-get install --reinstall [package]。缺失的文件将添加到系统中，并即时安装任何缺失的依赖项。然后可以按照通常的方式完全卸载软件包：sudo apt-get remove [package]。

如果apt-get因为其他（依赖性）问题而拒绝重新安装该包，则只能使用apt-get下载该包并dpkg直接使用来安装它：

apt-get download mysql-common
sudo dpkg -i mysql-common_*.deb
sudo apt-get install -f

有时你可以跳过下载，因为 Apt 倾向于保留以前下载和安装的软件包的存档，/var/cache/apt/archives/因此你可以直接从第 2 步开始：

sudo dpkg -i /var/cache/apt/archives/mysql-common_*.deb

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